下面是利用正则表达式来判断字符串包含指定字符的php代码，主要用到了ereg函数来征
//实例一
| 代码如下 | 复制代码 |
| $string="i am abc"; if (ereg ("www.111cn.net", $string)) echo "'abc' is true "; "; |
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//实例二
| 代码如下 | 复制代码 |
| $string = "this is a test. that is another test."; echo ereg_replace (" is", " was", $string)." "; "; |
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