3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function wrap( $arr){ test( $arr); } function test( $arr){ $refs = array(); // Array of references that we've seen $f = function( &$arr) use( &$refs, &$f) { $refs[] = $arr; foreach( $arr as &$v) { if( in_array( $v, $refs, true)) { print 'ref, '; } else { if( is_array( $v)) { $f( $v); } else { print $v . ', '; } } } }; $f( $arr); } $array = array(1, 2, array(1, 2), array(1, 2)); wrap( $array);
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
1, 2, 1, 2, ref,
Output for 5.2.3 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/8EeGD on line 9
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.2
<br /> <b>Parse error</b>: syntax error, unexpected T_FUNCTION in <b>/in/8EeGD</b> on line <b>9</b><br />
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
<br /> <b>Parse error</b>: parse error, unexpected T_FUNCTION in <b>/in/8EeGD</b> on line <b>9</b><br />
Process exited with code 255.
Output for 4.3.2 - 4.3.4
<br /> <b>Parse error</b>: parse error in <b>/in/8EeGD</b> on line <b>9</b><br />
Process exited with code 255.