关于PHP模板应用技巧总结
PHP经过长时间的发展,很多用户都很了解PHP了,这里我发表一下个人理解,和大家讨论讨论。我发现很多的PHP程序员,尤其是学习还不是很久的,都不知道PHP的精华所在。Perl当年如何在商界出名?其强大的正则表达式。而PHP呢?他是一门从Unix下发展起来的语言,当然也就继承了Perl的很多特点,同时C的优点都有。
这里,我想来写一篇PHP的变量、数组应用技巧和PHP的正则表达式、PHP模板应用,以后有时间再写PHP与 COM、PHP与XML的完全结合。
1、PHP模板
2、变量、数组的应用技巧
(1)很多人用得不多的数组函数。foreach、list、each。分别举几个例子,应该就能知道了。例:
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(2)函数的变量、变量的变量、变量的“指针”:看下例:
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变量的“指针”。这个指针加上了双引号,表明他不是真正的指针。看看下例:
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之所以称其为“指针”,就是因为他有了和C语言中指针相同的功能。但这又不是真正的指针,只能够是这样的去理解。
3、正则表达式
正则表达式是一个非常大的题目,Perl的正则表达式的强大是闻了名的。而PHP也不弱,他继承了Perl的正则表达式法则,还有自己的一套法则。这里只说PHP自己的正则表达式。正则表达式是最基本的元素。简单地说就是一套规则,用于去判定其它的元素是不是符合自身的规则,或者说是不是有相同的特征描述。正则表达式的开始符:^,结尾符$,这两个符号间的是匹配的元素。如检查一个电话号码是不是打往北京的号,用正则表达式表示就是“^010$”。只要前3位区号是010,就是北京的号,后面的电话号码就不用管了。然后,用正则表达式匹配函数ereg来判断,例:
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这就是正则表达式。北京的电话都是8位数字的,那我要知道这个号码是不是正确了?假如他按了9位号呢?如果判断正误?这就要用到正则表达式的字符簇。那么上例的正则表达式就要这样写:^010[0-9]{8}$,就能同时判断号码是不是符合规则。正则表达式有很多的应用,像LBB、VBB论坛在发贴时的所谓VBB代码LBB代码的解析,都是用正则表达式完成的。

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