Online PHP editor | output for r1W6h

@ 2014-09-04T06:55:07Z

<?php
 
// Issue 1, empty associative arrays (dictionaries) become regular arrays.
 
$dictionary = array('key' => 'value');
var_dump(json_encode($dictionary)); // gives '{"key":"value"}';
 
unset($dictionary['key']);
 
var_dump(json_encode($dictionary)); // Gives '[]' -> json dictionary turned into array
 
var_dump(json_encode((Object)$dictionary)); // Gives '{}' -> json dictionary stays dictionary
 
// Issue 2, array manipulations that involve the array indexes, turn numeric arrays into dictionaries.
 
$fruits = array("apples", "oranges");
 
var_dump(json_encode($fruits)); // Gives ["apples", "oranges"]
 
unset($fruits[0]); // Don't like apples.
 
var_dump(json_encode($fruits)); // Gives '{"1":"oranges"}' -> wow, array turned into dictionary.

Output for 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: string(15) "{"key":"value"}" string(2) "[]" string(2) "{}" string(20) "["apples","oranges"]" string(15) "{"1":"oranges"}"
Output for 5.0.0 - 5.0.5, 5.1.1 - 5.1.6: Fatal error: Call to undefined function json_encode() in /in/r1W6h on line 6
Process exited with code 255.
Output for 5.1.0: Fatal error: fatal flex scanner internal error--end of buffer missed in /in/r1W6h on line 22
Process exited with code 255.
Output for 4.4.5 - 4.4.9: Fatal error: Call to undefined function: json_encode() in /in/r1W6h on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4: Fatal error: Call to undefined function: json_encode() in /in/r1W6h on line 6
Process exited with code 255.
Output for 4.3.0 - 4.3.1: Fatal error: Call to undefined function: json_encode() in /in/r1W6h on line 6

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