<?php $str = 'php is the best language phhhhp is'; $part = '/ph{1,}p/'; echo preg_match($part, $str,$ar1); var_dump($ar1); echo preg_match_all($part, $str,$ar); var_dump($ar); echo $ar[0][0];
1 array 0 => string 'php' (length=3) 2 array 0 => array 0 => string 'php' (length=3) 1 => string 'phhhhp' (length=6) php
php比较两个数组不同元素 函数array_diff:
常用函数:
$a = array('a','b','c');
$b = array('a','b','d');
$c = array_diff($a,$b);
$d = array_diff($b,$a);
打印:
$c = array('c');
$d = array('d');
php正则表达式:
http://deerchao.net/tutorials/regex/regex-1.htm
需要转义字符:
. * ^ & [ ] { } ?