比较变量PHP [英] Compare variables PHP

问题描述

如何比较两个变量字符串，如下所示：

How can I compare two variable strings, would it be like so:

$myVar = "hello";
if ($myVar == "hello") {
//do code
}

要检查一个$ _GET []变量是否存在于url中，它将是这样的

And to check to see if a $_GET[] variable is present in the url would it be like this"

$myVars = $_GET['param'];
if ($myVars == NULL) {
//do code
}

推荐答案

    $myVar = "hello";
    if ($myVar == "hello") {
    //do code
    }

 $myVar = $_GET['param'];
    if (isset($myVar)) {
    //IF THE VARIABLE IS SET do code
    }


if (!isset($myVar)) {
        //IF THE VARIABLE IS NOT SET do code
 }

第一次启动PHP时需要花费几天时间：

For your reference, something that stomped me for days when first starting PHP:

$_GET["var1"] // these are set from the header location so www.site.com/?var1=something
$_POST["var1"] //these are sent by forms from other pages to the php page

这篇关于比较变量PHP的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！