JuniorTheoryCommon

What does the program print?

PHP

<?php

$data = ['id' => 1, 'tags' => ['a', 'b'], 'ok' => true];
$json = json_encode($data);
$back = json_decode($json, true);
$obj = json_decode($json);
echo $json, ' ', $back['tags'][1], ' ', $obj->id, "\n";

{"id":1,"tags":["a","b"],"ok":true} b 1

Expecting json_decode to return an array every time: without the second argument true it returns a stdClass object, read with ->, not with [].
Expecting every PHP array to become a JSON object: a list with keys 0, 1, 2… is written as a JSON array, and only other keys give an object.

What does json_decode return for a string that is not valid JSON?
Which flag makes json_encode write Cyrillic letters as they are?

Back to questions Open topic in roadmap →Answer it yourself — Quiz

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JuniorTheoryCommon

What does the program print?

PHP

<?php

$data = ['id' => 1, 'tags' => ['a', 'b'], 'ok' => true];
$json = json_encode($data);
$back = json_decode($json, true);
$obj = json_decode($json);
echo $json, ' ', $back['tags'][1], ' ', $obj->id, "\n";

{"id":1,"tags":["a","b"],"ok":true} b 1

Expecting json_decode to return an array every time: without the second argument true it returns a stdClass object, read with ->, not with [].
Expecting every PHP array to become a JSON object: a list with keys 0, 1, 2… is written as a JSON array, and only other keys give an object.

What does json_decode return for a string that is not valid JSON?
Which flag makes json_encode write Cyrillic letters as they are?

Back to questions Open topic in roadmap →Answer it yourself — Quiz