对php中几个数组函数的理解-用来自动压缩js文件的php代码-php 中 file_get_content 模拟post数据

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▪对php中几个数组函数的理解对php中几个数组函数的理解，有需要的朋友可以参考下。一、array_reduce 函数 (PHP 4 >= 4.0.5, PHP 5) array_reduce —用回调函数迭代地将数组简化为单一的值说明 mixedarray_reduce ( array $input , callback .........

▪用来自动压缩js文件的php代码使用php自动压缩JS文件，有需要的朋友，可以参考下。 1、JS压缩类class.JavaScriptPacker.php。代码如下: <?php /* 9 April 2008. version 1.1 * * This is the php version of the Dean.........

▪php 中 file_get_content 模拟post数据我们知道，在php中用file_get_content来get数据很简单，直接把URL参数放在URL中就可以了，但是POST呢？文件1：index.php 用来检测是否有post数据。代码如下: <?php if($_POST['a'] && $_P.........

[1]对php中几个数组函数的理解

来源: 互联网发布时间: 2013-12-24

对php中几个数组函数的理解，有需要的朋友可以参考下。

一、array_reduce 函数

(PHP 4 >= 4.0.5, PHP 5)

array_reduce —用回调函数迭代地将数组简化为单一的值

说明
mixedarray_reduce ( array $input , callback $function [, int $initial ] )

array_reduce() 将回调函数function 迭代地作用到 input 数组中的每一个单元中，从而将数组简化为单一的值。如果指定了可选参数initial，该参数将被当成是数组中的第一个值来处理，或者如果数组为空的话就作为最终返回值。如果数组为空并且没有传递initial 参数，array_reduce() 返回NULL。
例子：

代码如下:

<?php
 // 求和
 function rsum($v, $w)
 {
 return $v;
 }

 // 求沉积
 function rmul($v, $w)
 {
 return $v;
 }

 $a = array(1, 2, 3, 4, 5);
 $x = array();
 $b = array_reduce($a, "rsum");
 echo 'result：';
 print_r($b);
 echo ' ';

 // 以上输出15，相当于array_sum

 $c = array_reduce($a, "rsum", 1);
 echo 'result：';
 print_r($c);
 echo ' ';

 // 输出16，相当于array_sum 再加上1

 $d = array_reduce($a, "rmul", 10);
 echo 'result：';
 print_r($d);
 echo ' ';
 // 1200，相当于10 * 1 * 2 * 3 * 4 * 5

 $d = array_reduce($a, "rmul");
 echo 'result：';
 print_r($d);
 echo ' ';
 // 0，相当于 0 * 1 * 2 * 3 * 4 * 5

 $d = array_reduce($x, "rsum", 1);
 echo 'result：';
 print_r($d);
 // 输出1 由于$x为空，所以直接传回initial

二、array_chunk 函数

(PHP 4 >= 4.2.0, PHP 5)

array_chunk — 将一个数组分割成多个
说明
array array_chunk ( array$input , int$size [, bool$preserve_keys ] )

array_chunk() 将一个数组分割成多个数组，其中每个数组的单元数目由size 决定（即每个数组的元素为size个）。最后一个数组的单元数目可能会少几个。得到的数组是一个多维数组中的单元，其索引从零开始。

将可选参数 preserve_keys 设为 TRUE，可以使 PHP 保留输入数组中原来的键名。如果你指定了 FALSE，那每个结果数组将用从零开始的新数字索引。默认值是FALSE。
这个函数比较好理解，不多说。

三、array_flip 函数

(PHP 4, PHP 5)

array_flip — 交换数组中的键和值
说明
array array_flip ( array$trans )

array_flip() 返回一个反转后的array，例如 trans 中的键名变成了值，而trans 中的值成了键名。

注意 trans 中的值需要能够作为合法的键名，例如需要是integer 或者 string。如果值的类型不对将发出一个警告，并且有问题的键／值对将不会反转。

如果同一个值出现了多次，则最后一个键名将作为它的值，所有其它的都丢失了。

array_flip() 如果失败返回FALSE。

注意：连续调用两次可去重的哦！

四、array_filter 函数

(PHP 4 >= 4.0.6, PHP 5)

array_filter — 用回调函数过滤数组中的单元
说明
array array_filter ( array$input [, callback$callback ] )

array_filter() 依次将input 数组中的每个值传递到 callback 函数。如果callback 函数返回 TRUE，则input 数组的当前值会被包含在返回的结果数组中。数组的键名保留不变。

array_filter() 例子

代码如下:

<?php
 function odd($var)
 {
 return($var % 2 == 1);
 }

 function even($var)
 {
 return($var % 2 == 0);
 }

 $array1 = array("a"=>1, "b"=>2, "c"=>3, "d"=>4, "e"=>5);
 $array2 = array(6, 7, 8, 9, 10, 11, 12);

 echo "Odd :\n";
 print_r(array_filter($array1, "odd"));
 echo "Even:\n";
 print_r(array_filter($array2, "even"));
 ?>

输出：
    Odd :
    Array
    (
        [a] => 1
        [c] => 3
        [e] => 5
    )
    Even:
    Array
    (
        [0] => 6
        [2] => 8
        [4] => 10
        [6] => 12
    )

用户不应在回调函数中修改数组本身。例如增加／删除单元或者对 array_filter() 正在作用的数组进行 unset。如果数组改变了，此函数的行为没有定义。

如果没有提供 callback 函数，array_filter() 将删除input 中所有等值为 FALSE 的条目。更多信息见转换为布尔值。

代码如下:

<?php

 $entry = array(
 0 => 'foo',
 1 => false,
 2 => -1,
 3 => null,
 4 => ''
 );

 print_r(array_filter($entry));
 ?>

上例输出：
Array
    (
        [0] => foo
        [2] => -1
    )

[2]用来自动压缩js文件的php代码

来源: 互联网发布时间: 2013-12-24

使用php自动压缩JS文件，有需要的朋友，可以参考下。

1、JS压缩类class.JavaScriptPacker.php。

代码如下:

<?php
 /* 9 April 2008. version 1.1
 *
 * This is the php version of the Dean Edwards JavaScript's Packer,
 * Based on :
 *
 * ParseMaster, version 1.0.2 (2005-08-19) Copyright 2005, Dean Edwards
 * a multi-pattern parser.
 * KNOWN BUG: erroneous behavior when using escapeChar with a replacement
 * value that is a function
 *
 * packer, version 2.0.2 (2005-08-19) Copyright 2004-2005, Dean Edwards
 *
 * License: http://creativecommons.org/licenses/LGPL/2.1/
 *
 * Ported to PHP by Nicolas Martin.
 *
 * ----------------------------------------------------------------------
 * changelog:
 * 1.1 : correct a bug, '/0' packed then unpacked becomes '/'.
 * ----------------------------------------------------------------------
 *
 * examples of usage :
 * $myPacker = new JavaScriptPacker($script, 62, true, false);
 * $packed = $myPacker->pack();
 *
 * or
 *
 * $myPacker = new JavaScriptPacker($script, 'Normal', true, false);
 * $packed = $myPacker->pack();
 *
 * or (default values)
 *
 * $myPacker = new JavaScriptPacker($script);
 * $packed = $myPacker->pack();
 *
 *
 * params of the constructor :
 * $script: the JavaScript to pack, string.
 * $encoding: level of encoding, int or string :
 * 0,10,62,95 or 'None', 'Numeric', 'Normal', 'High ASCII'.
 * default: 62.
 * $fastDecode: include the fast decoder in the packed result, boolean.
 * default : true.
 * $specialChars: if you are flagged your private and local variables
 * in the script, boolean.
 * default: false.
 *
 * The pack() method return the compressed JavasScript, as a string.
 *
 * see http://dean.edwards.name/packer/usage/ for more information.
 *
 * Notes :
 * # need PHP 5 . Tested with PHP 5.1.2, 5.1.3, 5.1.4, 5.2.3
 *
 * # The packed result may be different than with the Dean Edwards
 * version, but with the same length. The reason is that the PHP
 * function usort to sort array don't necessarily preserve the
 * original order of two equal member. The Javascript sort function
 * in fact preserve this order (but that's not require by the
 * ECMAScript standard). So the encoded keywords order can be
 * different in the two results.
 *
 * # Be careful with the 'High ASCII' Level encoding if you use
 * UTF-8 in your files...
 */

 class JavaScriptPacker {
 // constants
 const IGNORE = '$1';
 // validate parameters
 private $_script = '';
 private $_encoding = 62;
 private $_fastDecode = true;
 private $_specialChars = false;

 private $LITERAL_ENCODING = array(
 'None' => 0,
 'Numeric' => 10,
 'Normal' => 62,
 'High ASCII' => 95
 );

 public function __construct($_script, $_encoding = 62, $_fastDecode = true, $_specialChars = false)
 {
 $this->_script = $_script . "/n";
 if (array_key_exists($_encoding, $this->LITERAL_ENCODING))
 $_encoding = $this->LITERAL_ENCODING[$_encoding];
 $this->_encoding = min((int)$_encoding, 95);
 $this->_fastDecode = $_fastDecode;
 $this->_specialChars = $_specialChars;
 }

 public function pack() {
 $this->_addParser('_basicCompression');
 if ($this->_specialChars)
 $this->_addParser('_encodeSpecialChars');
 if ($this->_encoding)
 $this->_addParser('_encodeKeywords');

 // go!
 return $this->_pack($this->_script);
 }

 // apply all parsing routines
 private function _pack($script) {
 for ($i = 0; isset()($this->_parsers[$i]); $i++) {
 $script = call_user_func(array(&$this,$this->_parsers[$i]), $script);
 }
 return $script;
 }

 // keep a list of parsing functions, they'll be executed all at once
 private $_parsers = array();
 private function _addParser($parser) {
 $this->_parsers[] = $parser;
 }

 // zero encoding - just removal of white space and comments
 private function _basicCompression($script) {
 $parser = new ParseMaster();
 // make safe
 $parser->escapeChar = '//';
 // protect strings
 $parser->add('//'[^/'//n//r]*/'/', self::IGNORE);
 $parser->add('/"[^"//n//r]*"/', self::IGNORE);
 // remove comments
 $parser->add('///////[^//n//r]*[//n//r]/', ' ');
 $parser->add('//////*[^*]*//*+([^///][^*]*//*+)*////', ' ');
 // protect regular expressions
 $parser->add('///s+(///[^/////n//r//*][^/////n//r]*///g?i?)/', '$2'); // IGNORE
 $parser->add('/[^//w//x24////'"*)//?:]///[^/////n//r//*][^/////n//r]*///g?i?/', self::IGNORE);
 // remove: ;;; doSomething();
 if ($this->_specialChars) $parser->add('/;;;[^//n//r]+[//n//r]/');
 // remove redundant semi-colons
 $parser->add('///(;;//)/', self::IGNORE); // protect for (;;) loops
 $parser->add('/;+//s*([};])/', '$2');
 // apply the above
 $script = $parser->exec($script);
 // remove white-space
 $parser->add('/(//b|//x24)//s+(//b|//x24)/', '$2 $3');
 $parser->add('/([+//-])//s+([+//-])/', '$2 $3');
 $parser->add('///s+/', '');
 // done
 return $parser->exec($script);
 }

 private function _encodeSpecialChars($script) {
 $parser = new ParseMaster();
 // replace: $name -> n, $$name -> na
 $parser->add('/((//x24+)([a-zA-Z$_]+))(//d*)/',
 array('fn' => '_replace_name')
 );
 // replace: _name -> _0, double-underscore (__name) is ignored
 $regexp = '///b_[A-Za-z//d]//w*/';
 // build the word list
 $keywords = $this->_analyze($script, $regexp, '_encodePrivate');
 // quick ref
 $encoded = $keywords['encoded'];

 $parser->add($regexp,
 array(
 'fn' => '_replace_encoded',
 'data' => $encoded
 )
 );
 return $parser->exec($script);
 }

 private function _encodeKeywords($script) {
 // escape high-ascii values already in the script (i.e. in strings)
 if ($this->_encoding > 62)
 $script = $this->_escape95($script);
 // create the parser
 $parser = new ParseMaster();
 $encode = $this->_getEncoder($this->_encoding);
 // for high-ascii, don't encode single character low-ascii
 $regexp = ($this->_encoding > 62) ? '///w//w+/' : '///w+/';
 // build the word list
 $keywords = $this->_analyze($script, $regexp, $encode);
 $encoded = $keywords['encoded'];

 // encode
 $parser->add($regexp,
 array(
 'fn' => '_replace_encoded',
 'data' => $encoded
 )
 );
 if (emptyempty($script)) return $script;
 else {
 //$res = $parser->exec($script);
 //$res = $this->_bootStrap($res, $keywords);
 //return $res;
 return $this->_bootStrap($parser->exec($script), $keywords);
 }
 }

 private function _analyze($script, $regexp, $encode) {
 // analyse
 // retreive all words in the script
 $all = array();
 preg_match_all($regexp, $script, $all);
 $_sorted = array(); // list of words sorted by frequency
 $_encoded = array(); // dictionary of word->encoding
 $_protected = array(); // instances of "protected" words
 $all = $all[0]; // simulate the javascript comportement of global match
 if (!emptyempty($all)) {
 $unsorted = array(); // same list, not sorted
 $protected = array(); // "protected" words (dictionary of word->"word")
 $value = array(); // dictionary of charCode->encoding (eg. 256->ff)
 $this->_count = array(); // word->count
 $i = count($all); $j = 0; //$word = null;
 // count the occurrences - used for sorting later
 do {
 --$i;
 $word = '$' . $all[$i];
 if (!isset($this->_count[$word])) {
 $this->_count[$word] = 0;
 $unsorted[$j] = $word;
 // make a dictionary of all of the protected words in this script
 // these are words that might be mistaken for encoding
 //if (is_string($encode) && method_exists($this, $encode))
 $values[$j] = call_user_func(array(&$this, $encode), $j);
 $protected['$' . $values[$j]] = $j++;
 }
 // increment the word counter
 $this->_count[$word]++;
 } while ($i > 0);
 // prepare to sort the word list, first we must protect
 // words that are also used as codes. we assign them a code
 // equivalent to the word itself.
 // e.g. if "do" falls within our encoding range
 // then we store keywords["do"] = "do";
 // this avoids problems when decoding
 $i = count($unsorted);
 do {
 $word = $unsorted[--$i];
 if (isset($protected[$word]) /*!= null*/) {
 $_sorted[$protected[$word]] = substr($word, 1);
 $_protected[$protected[$word]] = true;
 $this->_count[$word] = 0;
 }
 } while ($i);

 // sort the words by frequency
 // Note: the javascript and php version of sort can be different :
 // in php manual, usort :
 // " If two members compare as equal,
 // their order in the sorted array is undefined."
 // so the final packed script is different of the Dean's javascript version
 // but equivalent.
 // the ECMAscript standard does not guarantee this behaviour,
 // and thus not all browsers (e.g. Mozilla versions dating back to at
 // least 2003) respect this.
 usort($unsorted, array(&$this, '_sortWords'));
 $j = 0;
 // because there are "protected" words in the list
 // we must add the sorted words around them
 do {
 if (!isset($_sorted[$i]))
 $_sorted[$i] = substr($unsorted[$j++], 1);
 $_encoded[$_sorted[$i]] = $values[$i];
 } while (++$i < count($unsorted));
 }
 return array(
 'sorted' => $_sorted,
 'encoded' => $_encoded,
 'protected' => $_protected);
 }

 private $_count = array();
 private function _sortWords($match1, $match2) {
 return $this->_count[$match2] - $this->_count[$match1];
 }

 // build the boot function used for loading and decoding
 private function _bootStrap($packed, $keywords) {
 $ENCODE = $this->_safeRegExp('$encode//($count//)');
 // $packed: the packed script
 $packed = "'" . $this->_escape($packed) . "'";
 // $ascii: base for encoding
 $ascii = min(count($keywords['sorted']), $this->_encoding);
 if ($ascii == 0) $ascii = 1;
 // $count: number of words contained in the script
 $count = count($keywords['sorted']);
 // $keywords: list of words contained in the script
 foreach ($keywords['protected'] as $i=>$value) {
 $keywords['sorted'][$i] = '';
 }
 // convert from a string to an array
 ksort($keywords['sorted']);
 $keywords = "'" . implode('|',$keywords['sorted']) . "'.split('|')";
 $encode = ($this->_encoding > 62) ? '_encode95' : $this->_getEncoder($ascii);
 $encode = $this->_getJSFunction($encode);
 $encode = preg_replace('/_encoding/','$ascii', $encode);
 $encode = preg_replace('/arguments//.callee/','$encode', $encode);
 $inline = '//$count' . ($ascii > 10 ? '.toString(//$ascii)' : '');
 // $decode: code snippet to speed up decoding
 if ($this->_fastDecode) {
 // create the decoder
 $decode = $this->_getJSFunction('_decodeBody');
 if ($this->_encoding > 62)
 $decode = preg_replace('/////w/', '[//xa1-//xff]', $decode);
 // perform the encoding inline for lower ascii values
 elseif ($ascii < 36)
 $decode = preg_replace($ENCODE, $inline, $decode);
 // special case: when $count==0 there are no keywords. I want to keep
 // the basic shape of the unpacking funcion so i'll frig the code...
 if ($count == 0)
 $decode = preg_replace($this->_safeRegExp('($count)//s*=//s*1'), '$1=0', $decode, 1);
 }
 // boot function
 $unpack = $this->_getJSFunction('_unpack');
 if ($this->_fastDecode) {
 // insert the decoder
 $this->buffer = $decode;
 $unpack = preg_replace_callback('///{/', array(&$this, '_insertFastDecode'), $unpack, 1);
 }
 $unpack = preg_replace('/"/', "'", $unpack);
 if ($this->_encoding > 62) { // high-ascii
 // get rid of the word-boundaries for regexp matches
 $unpack = preg_replace('//'////////b/'/s*//+|//+/s*/'////////b/'/', '', $unpack);
 }
 if ($ascii > 36 || $this->_encoding > 62 || $this->_fastDecode) {
 // insert the encode function
 $this->buffer = $encode;
 $unpack = preg_replace_callback('///{/', array(&$this, '_insertFastEncode'), $unpack, 1);
 } else {
 // perform the encoding inline
 $unpack = preg_replace($ENCODE, $inline, $unpack);
 }
 // pack the boot function too
 $unpackPacker = new JavaScriptPacker($unpack, 0, false, true);
 $unpack = $unpackPacker->pack();

 // arguments
 $params = array($packed, $ascii, $count, $keywords);
 if ($this->_fastDecode) {
 $params[] = 0;
 $params[] = '{}';
 }
 $params = implode(',', $params);

 // the whole thing
 return 'eval(' . $unpack . '(' . $params . "))/n";
 }

 private $buffer;
 private function _insertFastDecode($match) {
 return '{' . $this->buffer . ';';
 }
 private function _insertFastEncode($match) {
 return '{$encode=' . $this->buffer . ';';
 }

 // mmm.. ..which one do i need ??
 private function _getEncoder($ascii) {
 return $ascii > 10 ? $ascii > 36 ? $ascii > 62 ?
 '_encode95' : '_encode62' : '_encode36' : '_encode10';
 }

 // zero encoding
 // characters: 0123456789
 private function _encode10($charCode) {
 return $charCode;
 }

 // inherent base36 support
 // characters: 0123456789abcdefghijklmnopqrstuvwxyz
 private function _encode36($charCode) {
 return base_convert($charCode, 10, 36);
 }

 // hitch a ride on base36 and add the upper case alpha characters
 // characters: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
 private function _encode62($charCode) {
 $res = '';
 if ($charCode >= $this->_encoding) {
 $res = $this->_encode62((int)($charCode / $this->_encoding));
 }
 $charCode = $charCode % $this->_encoding;

 if ($charCode > 35)
 return $res . chr($charCode + 29);
 else
 return $res . base_convert($charCode, 10, 36);
 }

 // use high-ascii values
 // characters: ?￠￡¤￥|§¨?a??-?ˉ°±23′μ?·?1o?????àá??????èéê?ìí??D?òó???×?ùú?üYT?àáa?????èéê?ìí??e?òó???÷?ùú?üyt
 private function _encode95($charCode) {
 $res = '';
 if ($charCode >= $this->_encoding)
 $res = $this->_encode95($charCode / $this->_encoding);

 return $res . chr(($charCode % $this->_encoding) + 161);
 }

 private function _safeRegExp($string) {
 return '/'.preg_replace('//$/', '///$', $string).'/';
 }

 private function _encodePrivate($charCode) {
 return "_" . $charCode;
 }

 // protect characters used by the parser
 private function _escape($script) {
 return preg_replace('/([/////'])/', '///$1', $script);
 }

 // protect high-ascii characters already in the script
 private function _escape95($script) {
 return preg_replace_callback(
 '/[//xa1-//xff]/',
 array(&$this, '_escape95Bis'),
 $script
 );
 }
 private function _escape95Bis($match) {
 return '/x'.((string)dechex(ord($match)));
 }


 private function _getJSFunction($aName) {
 if (defined('self::JSFUNCTION'.$aName))
 return constant('self::JSFUNCTION'.$aName);
 else
 return '';
 }

 // JavaScript Functions used.
 // Note : In Dean's version, these functions are converted
 // with 'String(aFunctionName);'.
 // This internal conversion complete the original code, ex :
 // 'while (aBool) anAction();' is converted to
 // 'while (aBool) { anAction(); }'.
 // The JavaScript functions below are corrected.

 // unpacking function - this is the boot strap function
 // data extracted from this packing routine is passed to
 // this function when decoded in the target
 // NOTE ! : without the ';' final.
 const JSFUNCTION_unpack =
 'function($packed, $ascii, $count, $keywords, $encode, $decode) {
 while ($count--) {
 if ($keywords[$count]) {
 $packed = $packed.replace(new RegExp(/'////b/' + $encode($count) + /'////b/', /'g/'), $keywords[$count]);
 }
 }
 return $packed;
 }';
 /*
 'function($packed, $ascii, $count, $keywords, $encode, $decode) {
 while ($count--)
 if ($keywords[$count])
 $packed = $packed.replace(new RegExp(/'////b/' + $encode($count) + /'////b/', /'g/'), $keywords[$count]);
 return $packed;
 }';
 */

 // code-snippet inserted into the unpacker to speed up decoding
 const JSFUNCTION_decodeBody =
 //_decode = function() {
 // does the browser support String.replace where the
 // replacement value is a function?
 ' if (!/'/'.replace(/^/, String)) {
 // decode all the values we need
 while ($count--) {
 $decode[$encode($count)] = $keywords[$count] || $encode($count);
 }
 // global replacement function
 $keywords = [function ($encoded) {return $decode[$encoded]}];
 // generic match
 $encode = function () {return /'////w+/'};
 // reset the loop counter - we are now doing a global replace
 $count = 1;
 }
 ';
 //};
 /*
 ' if (!/'/'.replace(/^/, String)) {
 // decode all the values we need
 while ($count--) $decode[$encode($count)] = $keywords[$count] || $encode($count);
 // global replacement function
 $keywords = [function ($encoded) {return $decode[$encoded]}];
 // generic match
 $encode = function () {return/'////w+/'};
 // reset the loop counter - we are now doing a global replace
 $count = 1;
 }';
 */

 // zero encoding
 // characters: 0123456789
 const JSFUNCTION_encode10 =
 'function($charCode) {
 return $charCode;
 }';//;';

 // inherent base36 support
 // characters: 0123456789abcdefghijklmnopqrstuvwxyz
 const JSFUNCTION_encode36 =
 'function($charCode) {
 return $charCode.toString(36);
 }';//;';

 // hitch a ride on base36 and add the upper case alpha characters
 // characters: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ
 const JSFUNCTION_encode62 =
 'function($charCode) {
 return ($charCode < _encoding ? /'/' : arguments.callee(parseInt($charCode / _encoding))) +
 (($charCode = $charCode % _encoding) > 35 ? String.fromCharCode($charCode + 29) : $charCode.toString(36));
 }';

 // use high-ascii values
 // characters: ?￠￡¤￥|§¨?a??-?ˉ°±23′μ?·?1o?????àá??????èéê?ìí??D?òó???×?ùú?üYT?àáa?????èéê?ìí??e?òó???÷?ùú?üyt
 const JSFUNCTION_encode95 =
 'function($charCode) {
 return ($charCode < _encoding ? /'/' : arguments.callee($charCode / _encoding)) +
 String.fromCharCode($charCode % _encoding + 161);
 }';

 }

 class ParseMaster {
 public $ignoreCase = false;
 public $escapeChar = '';

 // constants
 const EXPRESSION = 0;
 const REPLACEMENT = 1;
 const LENGTH = 2;

 // used to determine nesting levels
 private $GROUPS = '///(/';//g
 private $SUB_REPLACE = '///$//d/';
 private $INDEXED = '/^//$//d+$/';
 private $TRIM = '/([/'"])//1//.(.*)//.//1//1$/';
 private $ESCAPE = '////./';//g
 private $QUOTE = '//'/';
 private $DELETED = '///x01[^//x01]*//x01/';//g

 public function add($expression, $replacement = '') {
 // count the number of sub-expressions
 // - add one because each pattern is itself a sub-expression
 $length = 1 + preg_match_all($this->GROUPS, $this->_internalEscape((string)$expression), $out);

 // treat only strings $replacement
 if (is_string($replacement)) {
 // does the pattern deal with sub-expressions?
 if (preg_match($this->SUB_REPLACE, $replacement)) {
 // a simple lookup? (e.g. "$2")
 if (preg_match($this->INDEXED, $replacement)) {
 // store the index (used for fast retrieval of matched strings)
 $replacement = (int)(substr($replacement, 1)) - 1;
 } else { // a complicated lookup (e.g. "Hello $2 $1")
 // build a function to do the lookup
 $quote = preg_match($this->QUOTE, $this->_internalEscape($replacement))
 ? '"' : "'";
 $replacement = array(
 'fn' => '_backReferences',
 'data' => array(
 'replacement' => $replacement,
 'length' => $length,
 'quote' => $quote
 )
 );
 }
 }
 }
 // pass the modified arguments
 if (!emptyempty($expression)) $this->_add($expression, $replacement, $length);
 else $this->_add('/^$/', $replacement, $length);
 }

 public function exec($string) {
 // execute the global replacement
 $this->_escaped = array();

 // simulate the _patterns.toSTring of Dean
 $regexp = '/';
 foreach ($this->_patterns as $reg) {
 $regexp .= '(' . substr($reg[self::EXPRESSION], 1, -1) . ')|';
 }
 $regexp = substr($regexp, 0, -1) . '/';
 $regexp .= ($this->ignoreCase) ? 'i' : '';

 $string = $this->_escape($string, $this->escapeChar);
 $string = preg_replace_callback(
 $regexp,
 array(
 &$this,
 '_replacement'
 ),
 $string
 );
 $string = $this->_unescape($string, $this->escapeChar);

 return preg_replace($this->DELETED, '', $string);
 }

 public function reset() {
 // clear the patterns collection so that this object may be re-used
 $this->_patterns = array();
 }
 // private
 private $_escaped = array(); // escaped characters
 private $_patterns = array(); // patterns stored by index

 // create and add a new pattern to the patterns collection
 private function _add() {
 $arguments = func_get_args();
 $this->_patterns[] = $arguments;
 }

 // this is the global replace function (it's quite complicated)
 private function _replacement($arguments) {
 if (emptyempty($arguments)) return '';

 $i = 1; $j = 0;
 // loop through the patterns
 while (isset($this->_patterns[$j])) {
 $pattern = $this->_patterns[$j++];
 // do we have a result?
 if (isset($arguments[$i]) && ($arguments[$i] != '')) {
 $replacement = $pattern[self::REPLACEMENT];

 if (is_array($replacement) && isset($replacement['fn'])) {

 if (isset($replacement['data'])) $this->buffer = $replacement['data'];
 return call_user_func(array(&$this, $replacement['fn']), $arguments, $i);

 } elseif (is_int($replacement)) {
 return $arguments[$replacement + $i];

 }
 $delete = ($this->escapeChar == '' ||
 strpos($arguments[$i], $this->escapeChar) === false)
 ? '' : "/x01" . $arguments[$i] . "/x01";
 return $delete . $replacement;

 // skip over references to sub-expressions
 } else {
 $i += $pattern[self::LENGTH];
 }
 }
 }

 private function _backReferences($match, $offset) {
 $replacement = $this->buffer['replacement'];
 $quote = $this->buffer['quote'];
 $i = $this->buffer['length'];
 while ($i) {
 $replacement = str_replace()('$'.$i--, $match[$offset + $i], $replacement);
 }
 return $replacement;
 }

 private function _replace_name($match, $offset){
 $length = strlen($match[$offset + 2]);
 $start = $length - max($length - strlen($match[$offset + 3]), 0);
 return substr($match[$offset + 1], $start, $length) . $match[$offset + 4];
 }

 private function _replace_encoded($match, $offset) {
 return $this->buffer[$match[$offset]];
 }


 // php : we cannot pass additional data to preg_replace_callback,
 // and we cannot use &$this in create_function, so let's go to lower level
 private $buffer;

 // encode escaped characters
 private function _escape($string, $escapeChar) {
 if ($escapeChar) {
 $this->buffer = $escapeChar;
 return preg_replace_callback(
 '///' . $escapeChar . '(.)' .'/',
 array(&$this, '_escapeBis'),
 $string
 );

 } else {
 return $string;
 }
 }
 private function _escapeBis($match) {
 $this->_escaped[] = $match[1];
 return $this->buffer;
 }

 // decode escaped characters
 private function _unescape($string, $escapeChar) {
 if ($escapeChar) {
 $regexp = '/'.'//'.$escapeChar.'/';
 $this->buffer = array('escapeChar'=> $escapeChar, 'i' => 0);
 return preg_replace_callback
 (
 $regexp,
 array(&$this, '_unescapeBis'),
 $string
 );

 } else {
 return $string;
 }
 }
 private function _unescapeBis() {
 if (isset($this->_escaped[$this->buffer['i']])
 && $this->_escaped[$this->buffer['i']] != '')
 {
 $temp = $this->_escaped[$this->buffer['i']];
 } else {
 $temp = '';
 }
 $this->buffer['i']++;
 return $this->buffer['escapeChar'] . $temp;
 }

 private function _internalEscape($string) {
 return preg_replace($this->ESCAPE, '', $string);
 }
 }
 ?>

2、执行压缩的PHP文件 pack_js_file.php

代码如下:

<?php
 require 'tom-class.JavaScriptPacker.php';
 $t1 = microtime(true);
 $source_dir = realpath(dirname(__FILE__)."/..")."/common/script_unpacked";
 $out_dir = realpath(dirname(__FILE__)."/..")."/common/script";
 $d = dir( $source_dir );
 //echo "Handle: " . $d->handle . "/n";
 //echo "Path: " . $d->path . "/n";
 while (false !== ($entry = $d->read())) {
 if($entry=='.') continue;
 if($entry=='..') continue;
 if($entry=='.svn') continue;
 echo $entry."/n";
 $script = file_get_contents($source_dir. '/'. $entry);
 $packer = new JavaScriptPacker($script, 'Normal', true, false);
 $packed = $packer->pack();
 file_put_contents($out_dir. '/'. $entry, $packed);
 }
 $d->close();
 $t2 = microtime(true);
 $time = sprintf()('%.4f', ($t2 - $t1) );
 echo 'script in ', $time, ' s.', "/n";
 die;
?>

3、创建一个自动执行的bat文件。
在文件中输入如下的内容：
/usr/local/php/bin/php pack_js_file.php

总结：
只要填好相对路径或者绝对路径，一键加密JS完成，那是相当的方便！！

[3]php 中 file_get_content 模拟post数据

来源: 互联网发布时间: 2013-12-24

我们知道，在php中用file_get_content来get数据很简单，直接把URL参数放在URL中就可以了，但是POST呢？

文件1：index.php 用来检测是否有post数据。

代码如下:

<?php
 if($_POST['a'] && $_POST['b']) {
 echo 'post data success!';
 exit();
 }
?>

文件2：indexx.php 主要测试文件。

代码如下:

<?php
 $url = 'http://www.test.com/index.php';
 $data = array(
 'a' => '1',
 'b' => '2WWW'
 );
 $params = array(
 'http' => array(
 'method' => 'POST',
 'header' => "Content-type:application/x-www-form-urlencoded",
 'content' => http_build_query($data),
 ));
 for($i=0;$i<3;$i++){
 $response = file_get_contents($url, false, stream_context_create($params));
 if ($response) {
 echo $response;
 break;
 } else {
 echo 'tring ' . $i . ' failed! ';
 }
 }
?>

得到结果：
post data success!
数据成功被Post。