Home Backend Development PHP Tutorial PHP中出现Notice: Undefined index的三种解决方法

PHP中出现Notice: Undefined index的三种解决方法

Jun 13, 2016 pm 12:06 PM
error index notice php undefined

PHP中出现Notice: Undefined index的三种解决办法
http://blog.csdn.net/stellaah/article/details/7631727

前一段做的一个PHP程序在服务器运行正常,被别人拿到本机测试的时候总是出现“Notice: Undefined index:”这样的警告,这只是一个因为PHP版本不同而产生的警告(NOTICE或者WARNING),而非错误(ERROR)。PHP中的变量在不声明的情况下使用的时候,PHP4运行正常,但是到了PHP5环境下就会出现上述的警告或者提示。经过搜索查询,总结出来以下三种解决Notice: Undefined index的方法。
第一种方法:修改PHP配置文件,屏蔽掉此类警告和提示 修改php.ini配置文件,修改error_reporting为error_reporting = E_ALL & ~E_NOTICE 。这样程序中存在NOTICE和WARNING的不足之处的时候会被忽略,当然这对于新手来说并不合适,不仅不方便调试程序,而且不利于养成好的代码习惯。
第二种方法:对每个变量进行初始化 赋空值或者任意值即可,不影响运行。这对于变量比较多的程序来说比较繁琐,不过如果每次都提前设置下变量也是不错的习惯,例如: $blank = “”;$price = “15″:$car = “Truck”:
第三种方法:[email protected] 很容易,也很实用,一般第二种和第三种搭配使用。
@修饰符禁止函数调用导致的警告,不过这个修饰符无法禁止显示错误。

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