PHP正则表达式函数有哪些
PHP正则表达式函数有：1、“preg_filter”函数；2、“preg_grep”函数；3、“preg_last_error”函数；4、“preg_match”函数；5、“preg_quote”函数等等。
PHP正则表达式函数有哪些？
PHP 正则表达式(PCRE)
正则表达式(regular expression)描述了一种字符串匹配的模式，可以用来检查一个串是否含有某种子串、将匹配的子串做替换或者从某个串中取出符合某个条件的子串等。
更多正则表达式的内容可参考我们的：正则表达式 - 教程。
PHP 中我们可以使用 PCRE 扩展来匹配字符串的模式。
PCRE 函数
函数
preg_filter 执行一个正则表达式搜索和替换
preg_grep 返回匹配模式的数组条目
preg_last_error 返回最后一个PCRE正则执行产生的错误代码
preg_match_all 执行一个全局正则表达式匹配
preg_match 执行一个正则表达式匹配
preg_quote 转义正则表达式字符
preg_replace_callback_array 执行一个正则表达式搜索并且使用一个回调进行替换
preg_replace_callback 执行一个正则表达式搜索并且使用一个回调进行替换
preg_replace 执行一个正则表达式的搜索和替换
preg_split 通过一个正则表达式分隔字符串
更多相关知识，请访问PHP中文网！
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