3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php if ( !defined( 'JSON_PARTIAL_OUTPUT_ON_ERROR' ) ) { define( 'JSON_PARTIAL_OUTPUT_ON_ERROR', 0 ); } $a = []; $a[0] = 'A'; $a[1] =& $a; $a[2] = 'B'; var_dump( json_encode( array( $a ), JSON_PARTIAL_OUTPUT_ON_ERROR ) );
Output for 7.0.0 - 7.1.0
string(16) "[["A",null,"B"]]"
Output for 5.5.0 - 5.6.28, hhvm-3.10.0 - 3.12.0
string(26) "[["A",["A",null,"B"],"B"]]"
Output for 5.4.0 - 5.4.45
Warning: json_encode(): recursion detected in /in/ND64O on line 12 string(26) "[["A",["A",null,"B"],"B"]]"
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/ND64O on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/ND64O on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/ND64O on line 7
Process exited with code 255.