将php数组值作为JavaScript数组值传递

Question

I have a PHP array like this.

Array
(   
  [0] => hal([[br,1],[cl,4]])
  [1] => alk([[nc(1),1,2],[nc(1),3]])
)

How to pass to JavaScript like below.

var hal=[["br",1],[cl,4]];
var alk=[[nc(1),1,2],[nc(1),3]];

I write some code

<script>
  var data = <?=json_encode($input);?>;    //$input is name of the php array
  var hal=[data[0].substring(5,data[0].lastIndexOf(']'))];
  var alk=[data[1].substring(5,data[1].lastIndexOf(']'))];
  document.write(hal[0]);
</script>

The output is [br,1],[cl,1] and my expected output is like the one below.Any ideas? Thank you.

document.write(hal[0]);  => ["br",1]
document.write(hal[0][0]); => ["br"]

Answer 1

If you want multiple variables, you'll want to loop through the array; you can grab the names using a regular expression . If you're trying to turn this into valid data you can parse, like a JSON string, you're going to have to do an awful lot of work; likely wherever you're getting this string from would be a better place to look to. Have them pass you a valid JSON string instead.

<script>
<?php foreach($input as $v) {
    preg_match("/(\w+)\((.*)\)/", $v, $matches);
    $var = $matches[1];
    $val = str_replace("'", "\\'", $matches[2]);
    echo "var $var = '$val';\n";
} ?>
</script>

Answer 2

There's a package called Transform PHP Vars to JavaScript by Jeffrey Way that you can use to transfer your variable easily to your Javascript.

First, create an implementation of the Laracasts\\Utilities\\JavaScript\\ViewBinder interface. This class is in charge of inserting the given JavaScript into your view/page.

<?php

class MyAppViewBinder implements Laracasts\Utilities\JavaScript\ViewBinder {

    // $js will contain your JS-formatted variable initializations
    public function bind($js)
    {
        // Do what you need to do to add this JavaScript to
        // the appropriate place in your app.
    }
}

Next, put it all together:

$binder = new MyAppViewBinder;
$javascript = new PHPToJavaScriptTransformer($binder, 'window'); // change window to your desired namespace

$javascript->put(['foo' => 'bar']);

Now, you can access window.foo from your JavaScript.

Answer 3

I found an answer for my problem.Here i pass value from php as string.Then that string convert it to an object.
<?php
$input="hal([[br,1],[cl,4]])";
preg_match('@^([^[]+)?([^)]+)@i',$input, $hal); //get string as '[[br,1],[cl,4]]'
?>

<script>
var hal1 = <?=json_encode($hal[2]);?>; //'[[br,1,2],[cl,1,2]]' pass to javaScript

function toJSObject(str){
str = str.replace(/([a-zA-Z]+)/g, '"$1"');
return (JSON.parse(str))
}
var hal = toJSObject(hal1); // pass to JS object [['br',1,2],['cl',1,2]]
document.write(hal);
</script>
And also get this as right.
document.write(hal[0]); => ["br",1]
document.write(hal[0][0]); => ["br"]