Let's say you have a Javascript function like this :
function foo(param1,param2)
{
//some code here
}
param1 and param2 are stored in myDatabase.
It's my page.php that requests myDatabase to extract param1 and param2, then it stores them as PHP variables $param1 and $param2.
How to convert $param1 and $param2 from PHP to Javascript so i can call my function.
<div onClick="foo(param1,param2)"></div>
In you PHP file if $param1 is an integer and $param2 is a string you write
echo "<div onclick=\"foo($param1, '$param2')\"></div>";
Did you had this in mind:
<div onClick="foo(<?php echo $param1 ?>,(<?php echo $param2 ?>)"></div>
In case $param1 and $param2 should be string, array or object then you chould use json_encode before echoing:
<div onClick="foo(<?php echo htmlspecialchars(json_encode($param1)) ?>,(<?php echo htmlspecialchars(json_encode($param2)) ?>)"></div>
You must print those PHP variable values to the page, so JavaScript can access them.
Like this:
<script>
var param1 = <?= json_encode( $param1 ) ?>;
var param2 = <?= json_encode( $param2 ) ?>;
... other code ...
</script>
json_encode() is used to add quotes, escape quotes in strings etc.
Without it, your php string could break the javascript syntax.
json_encode() on PHP Arrays and Objects, then they will correct Javascript Arrays and Objects?
Object, but I know they work good for arrays and associative arrays. Maybe objects too.class A {public $foo = 1;} $a=new A(); Is json_encode($a) going to return something like this: var a { foo:1 } ?you can use like this
var simple ='<?php echo $sparam1; ?>';
and then pass in parameter
<div onClick="foo('<?php echo $param1 ?>', '<?php echo $param2 ?>')"></div>
Make sure you use single and double quotes properly.
<div onClick="foo('<?= $param1; ?>','<?= $param2; ?>')"></div>
