php多次include后导致全局变量global失效的解决方法
这篇文章主要介绍了php多次include后导致全局变量global失效的解决方法,实例分析了$GLOBALS失效的原理与解决方法,具有一定参考借鉴价值,需要的朋友可以参考下
本文实例讲述了php多次include后导致全局变量global失效的解决方法。分享给大家供大家参考。具体分析如下:
在多个文件中,文件一个接一个include,,但最后一个文件里的函数使用global后却无法引用全局变量。例如:
a.php文件:
b.php文件:
显示:null;
这种失效是由于多种原因造成的。一个有效的方法是,如果你决定将一个变量当作多个文件的全局变量,那么使用$GLOBALS数组总是有效的。比如上例中的a.php:
然后就可以在多个文件的函数、方法中引用这个变量了。
希望本文所述对大家的php程序设计有所帮助。

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