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<?php $arr = ['one', 'two', 'three', 'foo', 'bar', 'etc']; $prev = ''; foreach ($arr as &$ref) { $ref = $prev . $ref; $prev = $ref; } var_export($arr); $arr = ['one', 'two', 'three', 'foo', 'bar', 'etc']; var_export( array_map( function($v) { static $prev = ''; $v = $prev . $v; $prev = $v; return $v; }, $arr ) );
Output for git.master_jit, git.master, rfc.property-hooks
array ( 0 => 'one', 1 => 'onetwo', 2 => 'onetwothree', 3 => 'onetwothreefoo', 4 => 'onetwothreefoobar', 5 => 'onetwothreefoobaretc', )array ( 0 => 'one', 1 => 'onetwo', 2 => 'onetwothree', 3 => 'onetwothreefoo', 4 => 'onetwothreefoobar', 5 => 'onetwothreefoobaretc', )

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