PHP associative array to JSON using json_encode

Question

I need to convert tempArr, an associative array, to JSON and write it in a file.

I am using the following code, but I get a json_encode(): recursion detected warning.

$tempArr = array('one' => $var1, 'two'=> $var2, 'three'=>$var3);
$fp = fopen('myFile.json', 'w');
fwrite($fp, json_encode($tempArr));
fclose($fp);

What am I doing wrong?

Your code works fine for me. I think the variable values are relevant here. — Amal
– Amal, Commented Sep 13, 2013 at 12:34
I'd begin by looking what is in $var1, $var2, and $var3. Try replacing one a time until you know which one is the problem, then print_r the contents of that variable and post here — user128161
– user128161, Commented Sep 13, 2013 at 12:35

Christoph Diegelmann · Accepted Answer · 2013-09-13 12:43:01Z

0

Your error probably boils down to:

$a = array(&$a);
json_encode($a);

See: http://codepad.org/8dYy8Y3C

so you have a reference cycle somewhere in $var1, $var2, or $var3. Your mission: search and destroy it! As Jamie Bicknell commented: remove one at a time to see which one.

answered Sep 13, 2013 at 12:43

Christoph Diegelmann

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