How do I retrieve values from a PHP array?

Question

I have a array stored in a PHP file in which I am storing all the values.

I am trying to loop through the entire array in JavaScript. How should I do that?

The following does not work:

var index = 0;
var info = 1;

while(index<4) {
    info = <?php echo $a[?>index<?php];?>
    index++;
}

why don't you loop in php and process each iteration in javascript instead? — Sebas
– Sebas, Commented Jun 19, 2012 at 23:26
A PHP Array and you're trying to loop through it with JS? I'm not sure I'm following. Why? What are you trying to do? — Robert
– Robert, Commented Jun 19, 2012 at 23:26
There are so many related questions: stackoverflow.com/search?q=php+array+to+javascript — Felix Kling
– Felix Kling, Commented Jun 19, 2012 at 23:28
@Fox: JavaScript is executed in the browser, while PHP is executed on the server. You cannot mix languages like that. PHP generates some output which is sent as text to the browser and the browser interprets it as HTML and JavaScript. — Felix Kling
– Felix Kling, Commented Jun 19, 2012 at 23:29

jcubic · Accepted Answer · 2012-06-19 23:29:06Z

4

You can copy array from php to JavaScript and then process it.

var array = <?php echo json_encode($a); ?>
var index = 0;
var info = 1;

while(index<4) {
    info = array[index];
    index++;
}

answered Jun 19, 2012 at 23:29

jcubic

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1 Comment

sigod Over a year ago

Even better to use forEach.

somedev · Accepted Answer · 2012-06-19 23:29:48Z

2

I don't know what version of php you're using, but try something like this:

var info = null;
var a = <?php echo json_encode($a); ?>;

for(var index=0;index<a.length;index++) {
    info = a[index];
}

answered Jun 19, 2012 at 23:29

somedev

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Comments

kingcoyote · Accepted Answer · 2012-06-19 23:29:26Z

1

You need to process the PHP into Javascript first. You can use json_encode to do this.

var index = 0;
var info = 1;
var a = <?php echo json_encode($a); ?>;

while(index < 4) {
    info = a[index];
    index++;
}

answered Jun 19, 2012 at 23:29

kingcoyote

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Comments

Álvaro · Accepted Answer · 2012-06-19 23:30:52Z

0

PHP runs on the server side, before the final page is served to the client. Javascript runs on the client side (on the browser). Therefore, what you are trying to achieve won't work. What you can do is use PHP to print the javascript code dynamically.

answered Jun 19, 2012 at 23:30

Álvaro

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