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Summary of php regular expression examples

高洛峰
Release： 2016-10-20 15:14:53
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1. 根据购物车中的商品Item ID，准确判断客人的原装机型号。

"; print_r($arr); echo "
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"; } ?>


2.匹配日期

\n"; ?>
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3. 搜索单词 web

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4. 从url 中取出域名

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5. 你知道下面的程序输出什么?

]+>(.*)]+>|U", "example: 
this is a test
", $out, PREG_PATTERN_ORDER); // 注意PREG_PATTERN_ORDER和PREG_SET_ORDER的区别 print $out[0][0].", ".$out[0][1]."\n"; print $out[1][0].", ".$out[1][1]."\n"; echo "
"; print_r($out); ?>

        

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6. 功能: 转义正则表达式字符，此函数很有用，可以供你写正则表达式时参考

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7. 看人家如何用 preg_quote() 函数实现高亮显示

".$word."",$textbody); echo $textbody; ?>
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8. 用回调函数执行正则表达式的搜索和替换

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9. 在 preg_replace() 中使用索引数组

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10. 将 HTML 转换成文本

]*?>.*?'si", // 去掉 # "'<[\/\!]*?[^<>]*?>'si", // 去掉 HTML 标记 "'([\r\n])[\s]+'", // 去掉空白字符 "'&(quot|#34);'i", // 替换 HTML 实体 "'&(amp|#38);'i", "'&(lt|#60);'i", "'&(gt|#62);'i", "'&(nbsp|#160);'i", "'&(iexcl|#161);'i", "'&(cent|#162);'i", "'&(pound|#163);'i", "'&(copy|#169);'i", "'&#(\d+);'e"); // 作为 PHP 代码运行 $replace = array ("", "", "\\1", "\"", "&", "<", ">", " ", chr(161), chr(162), chr(163), chr(169), "chr(\\1)"); $text = preg_replace ($search, $replace, $document); ?>
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