<script type="text/javascript">
var int_val = 111;
</script>
<?php
$js_int_val_in_php ='<script>document.write(int_val);</script>';
echo $js_int_val_in_php; // 111
echo '<br>';
echo gettype($js_int_val_in_php); // string
// but I want it as an integer
// even settype(); does not help!!
?>
Anyone has any good idea how do I pass js integer value as integer in PHP?? I love jQuery but in this situation, please no jQuery suggestion.
You are confusing server-side variables with client-side variables,
You need to the data to the server, otherwise the server only knows the variable name, which is a string
<script>
var int_val=111;
function doAjax()
{
var xmlhttp;
xmlhttp=new XMLHttpRequest();
xmlhttp.open("GET","index.php?v="+int_val,true);
xmlhttp.send();
}
</script>
<a href="javascript:doAjax();">click here to send data to server</a>
<?php
$int_val=''
if (isset($_GET['v']))
{$int_val=intval($_GET['v']);}
//now you can access the `int_val` after the JS function ran
?>
I think that the question was already asked here: Unable to convert string to integer in PHP
If you want, you can also look at PHP typecasting here: http://php.net/manual/en/language.types.type-juggling.php#language.types.typecasting
and maybe have something like this?
<script type="text/javascript"> var int_val = 111</script>
<?php
$js_int_val_in_php = '<script>document.write(int_val);</script>';
echo $js_int_val_in_php; // 111
echo '<br>';
$toInt = (int) $js_int_val_in_php;
echo '<br>';
echo gettype($toInt); // string
?>
I haven't tested but I'm sure the typecasting should do the trick, don't forget to have a look at the URL I sent first
int_val, you are trying to typecast the string <script>document.write(int_val);</script>. $toInt will actually equal 0. Try doing a var_dump($toInt) to see.