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<?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 git.master, git.master_jit, rfc.property-hooks
1, 2, 1, 2, ref,

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