浅析PHP正则表达式的应用实例
PHP正则表达式的应用有很多,那么我们在实际开发应用中会遇到提取字符串、高级的代换的功能,那么如何实现呢?我们来看看具体的过程。
PHP正则表达式的应用之提取字符串介绍:
ereg() and eregi()
PHP正则表达式的应用之提取字符串实施:
有一个特性是允许用户通过正则表达式去提取字符串的一部分(具体用法你可以阅读手册).
比如说,我们想从 path/URL 提取文件名 – 下面的代码就是你需要:
<ol class="dp-c"> <li class="alt"><span><span class="func">ereg</span><span>(</span><span class="string">"([^\/]*)$"</span><span>, </span><span class="vars">$pathOrUrl</span><span>, </span><span class="vars">$regs</span><span>); </span></span></li> <li> <span class="func">echo</span><span> </span><span class="vars">$regs</span><span>[1]; </span> </li> </ol>
PHP正则表达式的应用之高级的代换介绍:
ereg_replace() 和 eregi_replace()也是非常有用的
PHP正则表达式的应用之高级的代换实施:
假如我们想把所有的间隔负号都替换成逗号:
<ol class="dp-c"><li class="alt"><span><span class="func">ereg_replace</span><span>(</span><span class="string">"[ nrt]+"</span><span>, </span><span class="string">","</span><span>, trim(</span><span class="vars">$str</span><span>)); </span></span></li></ol>
PHP正则表达式的应用的相关介绍就向你讲解到这里,希望对你了解和掌握PHP正则表达式的应用有所帮助。

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