CODEWITHSUNDEEP
phpjavascriptjson
pb_
pb_

Reputation: 492

Find length of array sent from php to javascript

I have an array in PHP.

$numArray=array("1","2","3","4");

I want to transfer this array to javascript along with other data. I do the following-

  $json = array(
          'num' => $numtArray
     );

In javascript I do the following.

var json=<?php echo json_encode($json); ?>;
console.log(json['num'].length);

I get undefined in console. How do I find length of this array?

Upvotes: 0

Views: 849

Answers (3)

Andrey Nelubin
Andrey Nelubin

Reputation: 3294

To transfer to json u need to encode your data, like this:

$json = array(
    'num' => $numtArray
);
$json = json_encode($json);

In JavaScript you need to parse json string

var json=<?php echo $json; ?>;
console.log(JSON.parse(json));

what is that show you? It seems to be an object with key 'num', which is an array you looking for.

I hope that will help you.

Upvotes: 0

kajacx
kajacx

Reputation: 12939

var jsonText = "<?php echo json_encode($json); ?>";
var jsonData = JSON.parse(jsonText);
console.log(jsonData['num'].length);

Upvotes: 0

Marc B
Marc B

Reputation: 360632

numArray v.s. numtArray. Notice the extra t... you're not assigning your array, you're assigning an undefined variable, producing a null.

Upvotes: 2

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