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<?php $s = 'string'; $a = []; $a['foo'] =& $s; var_dump($a); $a = []; $a['foo'] = $s; var_dump($a);
Output for git.master, git.master_jit, rfc.property-hooks
array(1) { ["foo"]=> &string(6) "string" } array(1) { ["foo"]=> string(6) "string" }

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