PHP正则表达式

<?php

	error_reporting(E_ALL); //报告所有错误，error_reporting(0)设置会忽略错误

        

        //与perl里面的正则类似，/****/i,//为正则表达式界定符，js也可这样表示	

	$regex = '/^http:\/\/([\w.]+)\/([\w]+)\/([\w]+)\.html$/i';

	$str = 'http://www.youku.com/show_page/id_ABCDEFG.html';

	$matches = array();

	

	if(preg_match($regex, $str, $matches)){

	    var_dump($matches);

	}

	

	echo "<br/>";

	$reg = '/(?<num>\d+)/i';

	$k = "asd33sdfds4434dsdfd2222";

	$m_array = array();

        //匹配所有的

	if(preg_match_all($reg, $k, $m_array))

	{

	   var_dump($m_array);

	}



    //将连续的数字替换为一个*

    $a = preg_replace('/(\d+)/i', '*', 'asd3343ddsf999dfdf000fff');

    echo "<br/>".$a;

    

   //用,.;符号分割字符

   $sv = preg_split('/[,\.;]/i', "aa,dd;xxx.sdsd");

   var_dump($sv);

  ?>