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    ▪php Hex RGB颜色值互换的例子      代码如下：   代码示例: <?php /**  * Hex RGB颜色值互换  * Edit www.  * at 2013/5/11 */ function HexToRGB($colour) { if ($colour [0] == '#') { $colour = substr ( $colour, 1 ); } if (strlen ( $colour ) == 6) { list ( $r,.........

    ▪php匹配任何网址的正则表达式      php匹配网址的正则，几乎可以匹配任何网址：   ^((https?|ftp|news):\/\/)?([a-z]([a-z0-9\-]*[\.。 ])+([a-z]{2}|aero|arpa|biz|com|coop|edu|gov|info|int|jobs|mil|museum|name|nato|net|org|pro|travel)|(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][.........

    ▪php静态类的罪与罚(原理详解与实例分析)      php静态类 静态类指的是无需实例化成对象，直接通过静态方式调用的类。 例子，   代码示例: <?php class Math { public static function ceil($value) { return ceil($value); } public static function floor($valu.........

代码示例:

<?php
/**
 * Hex RGB颜色值互换
 * Edit www.
 * at 2013/5/11
*/
function HexToRGB($colour) {
if ($colour [0] == '#') {
$colour = substr ( $colour, 1 );
}
if (strlen ( $colour ) == 6) {
list ( $r, $g, $b ) = array (
$colour [0] . $colour [1],
$colour [2] . $colour [3],
$colour [4] . $colour [5]
);
} elseif (strlen ( $colour ) == 3) {
list ( $r, $g, $b ) = array (
$colour [0] . $colour [0],
$colour [1] . $colour [1],
$colour [2] . $colour [2]
);
} else {
return false;
}
$r = hexdec ( $r );
$g = hexdec ( $g );
$b = hexdec ( $b );
return array (
'red' => $r,
'green' => $g,
'blue' => $b
);
}
function RGBToHex($rgb) {
$regexp = "/^rgb\(([0-9]{0,3})\,\s*([0-9]{0,3})\,\s*([0-9]{0,3})\)/";
$re = preg_match ( $regexp, $rgb, $match );
$re = array_shift ( $match );
$hexColor = "#";
$hex = array (
'0',
'1',
'2',
'3',
'4',
'5',
'6',
'7',
'8',
'9',
'A',
'B',
'C',
'D',
'E',
'F'
);
for($i = 0; $i < 3; $i ++) {
$r = null;
$c = $match [$i];
$hexAr = array ();

while ( $c > 16 ) {
$r = $c % 16;
$c = ($c / 16) >> 0;
array_push ( $hexAr, $hex [$r] );
}
array_push ( $hexAr, $hex [$c] );

$ret = array_reverse ( $hexAr );
$item = implode ( '', $ret );
$item = str_pad ( $item, 2, '0', STR_PAD_LEFT );
$hexColor .= $item;
}
return $hexColor;
}

//调用示例
echo implode ( ",", HexToRGB ( "#F7F7DA" ) ) . "<br/>";
echo RGBToHex ( "rgb(247,247,218)" )；
?>

^((https?|ftp|news):\/\/)?([a-z]([a-z0-9\-]*[\.。
])+([a-z]{2}|aero|arpa|biz|com|coop|edu|gov|info|int|jobs|mil|museum|name|nato|net|org|pro|travel)|(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9]
[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]))(\/[a-z0-9_\-\.~]+)*(\/([a-z0-9_\-\.]*)(\?[a-z0-9+_\-\.%=&]*)?)?(#[a-z][a-z0-9_]*)?$

代码示例:

<script type="text/javascript">
/**
*匹配任何网址的正则表达式
*www. at 20130509
*/
function IsURL(/blog_article/urlString/index.html)
{
regExp = /^((https?|ftp|news):\/\/)?([a-z]([a-z0-9\-]*[\.。
])+([a-z]{2}|aero|arpa|biz|com|coop|edu|gov|info|int|jobs|mil|museum|name|nato|net|org|pro|travel)|(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9]
[0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5]))(\/[a-z0-9_\-\.~]+)*(\/([a-z0-9_\-\.]*)(\?[a-z0-9+_\-\.%=&]*)?)?(#[a-z][a-z0-9_]*)?$/
if (urlString.match(regExp))
return "is a url";
else
return "not a url";
}
url = "";
alert(IsURL(/blog_article/url/index.html));
</script>

代码示例:

<?php
class Math
{
public static function ceil($value)
{
return ceil($value);
}

public static function floor($value)
{
return floor($value);
}
}
?>

代码示例:

<?php

class Article
{
public function save()
{
ArticleDAO::save();
}
}

?>

代码示例:

<?php
class Article
{
private static $dao = 'ArticleDAO';

public static funciton setDao($dao)
{
self::$dao = $dao;
}

public static function save()
{
$dao = self::$dao;

$dao::save();
}
}
?>

代码示例:

<?php
Article::setDao('MockArticleDAO');
Article::save();
?>

代码示例:

<?php

class Article
{
private $dao;

public function __construct($dao = null)
{
if ($dao === null) {
$dao = new ArticleDAO();
}

$this->setDao($dao);
}

public function setDao($dao)
{
$this->dao = $dao;
}

public function save()
{
$this->dao->save();
}
}

?>

代码示例:

<?php
$article = new Article(new MockArticleDAO());
$article->save();
?>