将 javascript 值分配给 php 变量
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Assign javascript value to php variable
提问by user1889007
I'm trying to check screen width and assign it to a php variable to do some if else statements. This is what I got.
我正在尝试检查屏幕宽度并将其分配给一个 php 变量来执行一些 if else 语句。这就是我得到的。
<script>
var mobileFormWidthCheck = $(window).width();
var mobileFormReady;
if(mobileFormWidthCheck < 767){
mobileFormReady = 22;
}
else{
mobileFormReady = 55;
}
</script>
<?php
$widthChecked = "<script>document.write(mobileFormReady);</script>";
echo $widthChecked;
?>
This works perfectly. But when I try to echo something based on the mobileFormReadyvalue, it doesnt echo.
这完美地工作。但是当我尝试根据mobileFormReady值回显某些内容时，它不会回显。
This is what im trying to get to work.
这就是我试图开始工作的原因。
$widthChecked = "<script>document.write(mobileFormReady);</script>";
if($widthChecked == "22"){
echo 'this page is under 767 pixels';
}
else if($widthChecked == "55"){
echo 'this page is OVER 767 pixels';
}
else{
echo 'NOT WORKING YET';
}
I think its a string integer issue. But I cant seem to figure it out. Can you guys please help me? Thanks a lot.
我认为它是一个字符串整数问题。但我似乎无法弄清楚。你们能帮帮我吗？非常感谢。
回答by Anuj Srivastava
I guess you can use cookies for it.
我想你可以使用cookies。
1) First add a cookie jquery plugin.
1）首先添加一个cookie jquery插件。
2) Then store that window width in a cookie variable.
2) 然后将该窗口宽度存储在 cookie 变量中。
3) Access your cookie in PHP like $_COOKIE['variable name'].(http://www.w3schools.com/php/php_cookies.asp)
3) 在 PHP 中访问您的 cookie，如 $_COOKIE['变量名']。( http://www.w3schools.com/php/php_cookies.asp)
回答by alwaysLearn
You cannot achieve what you want...
你无法达到你想要的...
The reason being
原因是
$widthChecked is "<script>document.write(mobileFormReady);</script>";
and not 22 or 55.
The reason you are getting the value on echois because it is executing the script and not printing the value of $widhcheck
您获取值的原因echo是因为它正在执行脚本而不是打印$widhcheck
