Sorry for a native question that maybe duplicated as I'm a newbie in Javascript & PHP. I want to know what if happened if I change a PHP global variable in Javascript? For example, in the following code, my expected result is 345. But now 335 is returned. I know that PHP is a server side program that will only run @ page load. But why doesn't the result be 333 then? Anyone can give me some comments? Thanks
PHP code:
$a = 3;
HTML:
<head>
<meta charset="utf-8">
</head>
<body>
<div>
<button type="button" onclick="func_change_php()">Change</button>
</div>
<div id="text1">
0
</div>
<div id="text2">
1
</div>
<div id="text3">
2
</div>
<script>
function func_change_text1() {
document.getElementById("text1").innerHTML = <?php echo $a;?>;
}
function func_change_text2() {
document.getElementById("text2").innerHTML = <?php echo $a;?>;
}
function func_change_text3() {
<?php $a = 5;?>
document.getElementById("text3").innerHTML = <?php echo $a;?>;
}
function func_change_php() {
func_change_text1();
<?php $a = 4;?>
func_change_text2();
func_change_text3();
}
</script>
</body>
Edited: If I re-arrange Javascript function by delicate func_change_php() first, same result (335) is given. But if I put $a=4 out from func_change_php() and put it to the beginning of script, the result become 445