PHP Parse Error: syntax error, unexpect...-php中json_decode()和json_encode()的...-php安全之直接用$获取值而不$_GET 字符转义

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▪PHP Parse Error: syntax error, unexpected $end 错误的解决办法这几天写php程序，感觉很多地方不如asp，asp.Net，jsp顺手，比如session使用先得session_start();，文件跳转header用的也不方便.... 也许是不熟悉的php的一些特性吧，不过写多了，也就慢慢适应将就.........

▪php中json_decode()和json_encode()的使用方法 1.json_decode() json_decode (PHP 5 >= 5.2.0, PECL json >= 1.2.0) json_decode — 对 JSON 格式的字符串进行编码说明 mixed json_decode ( string $json [, bool $assoc ] ) 接受一个 JSON 格式的字符串并且把它转换为 PHP .........

▪php安全之直接用$获取值而不$_GET 字符转义代码如下: <? function my_addslashes($string, $force = 0) { !defined('MAGIC_QUOTES_GPC') && define('MAGIC_QUOTES_GPC', get_magic_quotes_gpc()); if(!MAGIC_QUOTES_GPC || $force) { if(is_array($string)) { foreach($string as $key => $va.........

[1]PHP Parse Error: syntax error, unexpected $end 错误的解决办法

来源: 互联网发布时间: 2013-11-30

这几天写php程序，感觉很多地方不如asp，asp.Net，jsp顺手，比如session使用先得session_start();，文件跳转header用的也不方便....

也许是不熟悉的php的一些特性吧，不过写多了，也就慢慢适应将就了.....

这里就整理一个代码编写调试问题，错误如下：

Parse error: syntax error, unexpected $end in D:\xampp\htdocs\guestBook\guestBook.php on line 330

看看程序 330行，代码最后一行，这有什么错误？google搜，找到了：

In PHP 5, the following error may appears as an error entry in Apache error log or simply displays on PHP web page, even if calling to php scripts with php_info() works perfectly and successfully returns information on PHP configurations:

Parse Error: syntax error, unexpected $end in ….. scripts.php on line …

The error may caused by a missing curly bracket in PHP script coding. Beside, it may also caused by error in PHP coding in class definition, as in PHP, a class definition cannot be broke up and distributed into multiple files, or into multiple PHP blocks, unless the break is within a method declaration.

But more commonly, the error is often caused by the use of Short Open tags in PHP,

To use short open tags, it must be enabled in PHP.INI. Search for short_open_tag in PHP.INI, and change the value to On. The line should look line:

short_open_tag = On

欺我英文不好啊？看看其它几条搜索，都没说到点子上，那就看看英文了，虽不能如数翻译，大致意思是瞧明白了：

错误发生是使用了短标签，可以在php.ini中设置short_open_tag = On

原来Parse error 提示一般是语法错误,使用了开放的标签，语句没有结束也就是编程基本的一些错, 比如没注意语句结束加 ";" 或者 if(){...} 后面忘了"}" ；<?php...?>忘了"?>"。仔细检查代码，果然是一处漏掉了"}"，修改程序正常运行

[2]php中json_decode()和json_encode()的使用方法

来源: 互联网发布时间: 2013-11-30

1.json_decode()

json_decode
(PHP 5 >= 5.2.0, PECL json >= 1.2.0)

json_decode — 对 JSON 格式的字符串进行编码

说明
mixed json_decode ( string $json [, bool $assoc ] )
接受一个 JSON 格式的字符串并且把它转换为 PHP 变量

参数

json
待解码的 json string 格式的字符串。

assoc
当该参数为 TRUE 时，将返回 array 而非 object 。

返回值
Returns an object or if the optional assoc parameter is TRUE, an associative array is instead returned.

范例

Example #1 json_decode() 的例子

代码如下:

<?php
$json = '{"a":1,"b":2,"c":3,"d":4,"e":5}';
var_dump(json_decode($json));
var_dump(json_decode($json, true));
?>

上例将输出：

代码如下:

object(stdClass)#1 (5) {
["a"] => int(1)
["b"] => int(2)
["c"] => int(3)
["d"] => int(4)
["e"] => int(5)
}

array(5) {
["a"] => int(1)
["b"] => int(2)
["c"] => int(3)
["d"] => int(4)
["e"] => int(5)
}

代码如下:

$data='[{"Name":"a1","Number":"123","Contno":"000","QQNo":""},{"Name":"a1","Number":"123","Contno":"000","QQNo":""},{"Name":"a1","Number":"123","Contno":"000","QQNo":""}]';
echo json_decode($data);

结果为：

代码如下:

Array ( [0] => stdClass Object ( [Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ) [1] => stdClass Object ( [Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ) [2] => stdClass Object ( [Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ) )

可以看出经过json_decode()编译出来的是对象,现在输出json_decode($data,true)试下

代码如下:

echo json_decode($data,true);

结果：

代码如下:

Array ( [0] => Array ( [Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ) [1] => Array ( [Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ) [2] => Array ( [Name] => a1 [Number] => 123 [Contno] => 000 [QQNo] => ) )

可以看出 json_decode($data,true)输出的一个关联数组,由此可知json_decode($data）输出的是对象,而json_decode("$arr",true)是把它强制生成PHP关联数组.

2.json_encode()

json_encode
(PHP 5 >= 5.2.0, PECL json >= 1.2.0)

json_encode — 对变量进行 JSON 编码

Report a bug 说明
string json_encode ( mixed $value [, int $options = 0 ] )
返回 value 值的 JSON 形式

Report a bug 参数

value
待编码的 value ，除了resource 类型之外，可以为任何数据类型

该函数只能接受 UTF-8 编码的数据

options
由以下常量组成的二进制掩码： JSON_HEX_QUOT, JSON_HEX_TAG, JSON_HEX_AMP, JSON_HEX_APOS, JSON_NUMERIC_CHECK, JSON_PRETTY_PRINT, JSON_UNESCAPED_SLASHES, JSON_FORCE_OBJECT, JSON_UNESCAPED_UNICODE.

Report a bug 返回值
编码成功则返回一个以 JSON 形式表示的 string 或者在失败时返回 FALSE 。

Report a bug 更新日志
版本说明
5.4.0 options 参数增加常量： JSON_PRETTY_PRINT, JSON_UNESCAPED_SLASHES, 和 JSON_UNESCAPED_UNICODE。
5.3.3 options 参数增加常量：JSON_NUMERIC_CHECK。
5.3.0 增加 options 参数.

Report a bug 范例

Example #1 A json_encode() 的例子

代码如下:

<?php
$arr = array ('a'=>1,'b'=>2,'c'=>3,'d'=>4,'e'=>5);

echo json_encode($arr);
?>

以上例程会输出：

代码如下:

{"a":1,"b":2,"c":3,"d":4,"e":5}

Example #2 json_encode() 函数中 options 参数的用法

代码如下:

<?php
$a = array('<foo>',"'bar'",'"baz"','&blong&', "\xc3\xa9");

echo "Normal: ", json_encode($a), "\n";
echo "Tags: ", json_encode($a, JSON_HEX_TAG), "\n";
echo "Apos: ", json_encode($a, JSON_HEX_APOS), "\n";
echo "Quot: ", json_encode($a, JSON_HEX_QUOT), "\n";
echo "Amp: ", json_encode($a, JSON_HEX_AMP), "\n";
echo "Unicode: ", json_encode($a, JSON_UNESCAPED_UNICODE), "\n";
echo "All: ", json_encode($a, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP | JSON_UNESCAPED_UNICODE), "\n\n";

$b = array();

echo "Empty array output as array: ", json_encode($b), "\n";
echo "Empty array output as object: ", json_encode($b, JSON_FORCE_OBJECT), "\n\n";

$c = array(array(1,2,3));

echo "Non-associative array output as array: ", json_encode($c), "\n";
echo "Non-associative array output as object: ", json_encode($c, JSON_FORCE_OBJECT), "\n\n";

$d = array('foo' => 'bar', 'baz' => 'long');

echo "Associative array always output as object: ", json_encode($d), "\n";
echo "Associative array always output as object: ", json_encode($d, JSON_FORCE_OBJECT), "\n\n";
?>

以上例程会输出：

代码如下:

Normal: ["<foo>","'bar'","\"baz\"","&blong&","\u00e9"]
Tags: ["\u003Cfoo\u003E","'bar'","\"baz\"","&blong&","\u00e9"]
Apos: ["<foo>","\u0027bar\u0027","\"baz\"","&blong&","\u00e9"]
Quot: ["<foo>","'bar'","\u0022baz\u0022","&blong&","\u00e9"]
Amp: ["<foo>","'bar'","\"baz\"","\u0026blong\u0026","\u00e9"]
Unicode: ["<foo>","'bar'","\"baz\"","&blong&","é"]
All: ["\u003Cfoo\u003E","\u0027bar\u0027","\u0022baz\u0022","\u0026blong\u0026","é"]

Empty array output as array: []
Empty array output as object: {}

Non-associative array output as array: [[1,2,3]]
Non-associative array output as object: {"0":{"0":1,"1":2,"2":3}}

Associative array always output as object: {"foo":"bar","baz":"long"}
Associative array always output as object: {"foo":"bar","baz":"long"}

Example #3 连续与非连续数组示例

代码如下:

<?php
echo "连续数组".PHP_EOL;
$sequential = array("foo", "bar", "baz", "blong");
var_dump(
$sequential,
json_encode($sequential)
);

echo PHP_EOL."非连续数组".PHP_EOL;
$nonsequential = array(1=>"foo", 2=>"bar", 3=>"baz", 4=>"blong");
var_dump(
$nonsequential,
json_encode($nonsequential)
);

echo PHP_EOL."删除一个连续数组值的方式产生的非连续数组".PHP_EOL;
unset($sequential[1]);
var_dump(
$sequential,
json_encode($sequential)
);
?>

以上例程会输出：

代码如下:

连续数组
array(4) {
[0]=>
string(3) "foo"
[1]=>
string(3) "bar"
[2]=>
string(3) "baz"
[3]=>
string(5) "blong"
}
string(27) "["foo","bar","baz","blong"]"

非连续数组
array(4) {
[1]=>
string(3) "foo"
[2]=>
string(3) "bar"
[3]=>
string(3) "baz"
[4]=>
string(5) "blong"
}
string(43) "{"1":"foo","2":"bar","3":"baz","4":"blong"}"

删除一个连续数组值的方式产生的非连续数组
array(3) {
[0]=>
string(3) "foo"
[2]=>
string(3) "baz"
[3]=>
string(5) "blong"
}
string(33) "{"0":"foo","2":"baz","3":"blong"}"

代码如下:

$obj->Name= 'a1';$obj->Number ='123';
$obj->Contno= '000';
echo json_encode($obj);

结果为：

代码如下:

{"Name":"a1",
"Number":"123",
"Contno":"000"
}

可以看出json_encode()和json_decode()是编译和反编译过程，注意json只接受utf-8编码的字符，所以json_encode()的参数必须是utf-8编码，否则会得到空字符或者null。

[3]php安全之直接用$获取值而不$_GET 字符转义

来源: 互联网发布时间: 2013-11-30

代码如下:

<?
function my_addslashes($string, $force = 0) {
!defined('MAGIC_QUOTES_GPC') && define('MAGIC_QUOTES_GPC', get_magic_quotes_gpc());
if(!MAGIC_QUOTES_GPC || $force) {
if(is_array($string)) {
foreach($string as $key => $val) {
$string[$key] = my_addslashes($val, $force);
}
} else {
$string = addslashes($string);
}
}
return $string;
}
foreach(array('_COOKIE', '_POST', '_GET') as $_request) {
foreach($$_request as $_key => $_value) {
$_key{0} != '_' && $$_key = my_addslashes($_value);
}
}
echo $urls;
?>