php获取全局变量的简单代码_PHP教程

<span 1<="" span=""> <!--?<span php
</span--><span 2<="" span=""> <span *<="" span=""><span *="" <="" span=""><span 3<="" span=""> <span *="" 获取全局变量="" <="" span=""><span 4<="" span=""> <span *="" by="" www.jbxue.com="" <="" span=""><span 5<="" span=""> <span *="" <="" span="">
<span 6<="" span=""> <span function<="" span=""> cleanGlobal(<span $global_array<="" span="">, <span $arg<="" span="">, <span $specialchars<="" span=""> = <span true<="" span="">, <span $default<="" span=""> = <span null<="" span=""><span )="" {="" <="" span=""><span 7<="" span=""> 
<span 8<="" span=""> <span if<="" span="">(<span key_exists<="" span="">(<span $arg<="" span="">, <span $global_array<="" span="">) && <span $global_array<="" span="">[<span $arg<="" span="">] != <span null<="" span=""> && <span $global_array<="" span="">[<span $arg<="" span="">] != ""<span )="" {="" <="" span=""><span 9<="" span=""> <span if<="" span="">(<span $specialchars<="" span=""><span )="" {="" <="" span=""><span 10<="" span=""> <span return<="" span=""> <span htmlspecialchars<="" span="">(<span $global_array<="" span="">[<span $arg<="" span=""><span ]);="" <="" span=""><span 11<="" span=""> } <span else<="" span=""><span {="" <="" span=""><span 12<="" span=""> <span return<="" span=""> <span $global_array<="" span="">[<span $arg<="" span=""><span ];="" <="" span=""><span 13<="" span=""> <span }="" <="" span=""><span 14<="" span=""> } <span else<="" span=""><span {="" <="" span=""><span 15<="" span=""> <span return<="" span=""> <span $default<="" span=""><span ;="" <="" span=""><span 16<="" span=""> <span }="" <="" span=""><span 17<="" span=""> <span }="" <="" span=""><span 18<="" span=""> ?></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>

主要是用到了key_exists函数与htmlspecialchars函数，关于这二个函数的用法，大家可以参考w3school手册上的介绍。

http://www.bkjia.com/PHPjc/440302.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/440302.htmlTechArticle? cleanGlobal( , , = , = ( ( , ) [ ] != [ ] != "" ( ( [ } [ } ? 主要是用到了key_exists函数与htmlspecialchars函数，关于这二个函数的用法，大家可以参考w3s...