<?php
$str = '@!#$@# aa 42341 aaa @!#$!#@';
$pp['aaa'] = 'cc';
$pp['aa'] = 'bb';foreach ($pp as $key => $value) {
$key = '/'.$key.'/';
$str = preg_replace($key, $value, $str);
}
print $str;
?>
aaa包含aa,所以要把aaa写在前面,先替换aaa。
$str = '@!#$@# aa 42341 aaa @!#$!#@';
$pp['aaa'] = 'cc';
$pp['aa'] = 'bb';foreach ($pp as $key => $value) {
$key = '/'.$key.'/';
$str = preg_replace($key, $value, $str);
}
print $str;
?>
aaa包含aa,所以要把aaa写在前面,先替换aaa。
如果只是aa就变成bb。
$str = '@!#$@# aa 42341 aaa @!#$!#@';
$pp['aa'] = 'bb';
$pp['aaa'] = 'cc';
foreach ($pp as $key => $value) {
$key = '/[\s]'.$key.'[\s]/';
$str = preg_replace($key, $value, $str);
}
print $str;
?>
不好意思,我是为了明显才放上两个空格的
谢谢,后面跟的是(除了字母,数字,和下话线)什么都可以的
$pp['aa'] = 'bb';
$pp['aaa'] = 'cc';
foreach ($pp as $key => $value) {
$key = '/\b'.$key.'\b/';
$str = preg_replace($key, $value, $str);
}
print $str;