----- 019-regex_replace.php -----
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>Regex-Replace</title>
</head>
<body>
<h1>Regex-Replace</h1>
<pre style="font-family:微软雅黑; font-size:13pt">
<?php
$str = "喜羊羊灰太狼懒羊羊红太狼";
echo '替换字符串 "<b>喜羊羊灰太狼懒羊羊红太狼</b>"', "\n\n";
$result = preg_replace("/...羊羊/", " 樱桃小丸子 ", $str);
echo "羊->丸子：", $result, "\n";
$result = preg_replace("/...羊羊/", " 樱桃小丸子 ", $str, 1);
echo "羊->丸子 一次：", $result, "\n";
$result = preg_replace(array("/.{3}羊羊/", "/.{6}狼/"), array("羊", "狼"), $str);
echo "羊与狼：", $result, "\n";
$result = preg_replace_callback("/.../", "translate", $str, 11);
echo "翻译前11个字符：", $result, "\n";
$str = "熊大熊二";
echo "<b>\n切割字符串</b>\n";
$result = preg_split("/熊/", $str);
echo "熊切割后：\n";
var_export($result);
$result = preg_split("/熊/", $str, -1, PREG_SPLIT_NO_EMPTY);
echo "\n熊切割后忽略空白：\n";
var_export($result);
echo "<b>\n\n获取正则表达式</b>\n";
$str = "<img src= >!!!";
echo "获取正则表达式";
echo "忽略大小写：", @sql_regcase($str), "\n";
$str = "<img src= >!!";
echo "转义<img src= >!! ", preg_quote('<img src= >!!'), "\n";
echo "转义>img src= >!! ", preg_quote(">img src= >!!"), "\n";
?>
<?php
function translate($src)
{
$maps = array("喜"=>"Happy", "羊"=>"Sheep", "灰"=>"Gray", "太"=>"Too", "狼"=>"Wolf", "懒"=>"Lazy", "红"=>"Red");
return $maps[$src[0]]." ";
}
?>
</pre>
</body>
</html>
