preg_match_all正则匹配字符串所有连接地址,代码如下:
- $str ='"http://www.a.com/2010/11-15/5.html">4
- "http://www.b.com/2010/11-15/6.html">5
- "http://www.b.com/2010/11-15/1.html">6
- ';
- $ymd=date("y")."/".date("m-d");
- $b = preg_match_all('/.$ymd.'(.*?)html">(.*?)/',$a,$c,preg_set_order);
但是用preg_match正则提取目标内容,死活有问题,代码测得死去活来,后来发现“pcre.backtrack_limit”的值默认只设了100000。
解决办法,代码如下:ini_set(‘pcre.backtrack_limit’, 999999999);
注:这个参数在php 5.2.0版本之后可用。
另外说说关于:pcre.recursion_limit
pcre.recursion_limit是PCRE的递归限制,这个项如果设很大的值,会消耗所有进程的可用堆栈,最后导致PHP崩溃,也可以通过修改配置来限制,代码如下:
ini_set(‘pcre.recursion_limit’, 99999);
实际项目应用中,最好也对内存进行限定设置:
ini_set(‘memory_limit’, ’64M’);
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波比源码 » preg_match正则匹配的字符串
波比源码 » preg_match正则匹配的字符串
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