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run code in 150+ php & hhvm versions
Bugs & Features
<?php function searchNested($arr,$keyword){ $found = array(); foreach($arr as $item){ if($item['categorySlug']==$keyword){ $found[] = $item; }else{ $found = array_merge($found,__FUNC__($array,$keyword)); } } return $found; } var_dump(searchNested(array(array ( 'categoryName' => 'Moto', 'categoryTitle' => 'Moto', 'categorySlug' => 'moto-and-tech', 'categoryAttr' => array ( 0 => 'test1', 1 => 'test2', 2 => 'test3', 3 => 'test4' ), 'categoryNested' => array ( 0 => array ( 'categoryName' => 'anything', 'categoryTitle' => 'anything', 'categorySlug' => 'anything', 'categoryAttr' => array ( 0 => 'test1' 1 => 'test1' 2 => 'test1' 3 => 'test1' ), 'categoryNested' => array() ), 1 => array ( 'categoryName' => 'any', 'categoryTitle' => 'any', 'categorySlug' => 'any', 'categoryAttr' => array ( 0 => 'test1' 1 => 'test1' 2 => 'test1' 3 => 'test1' ), 'categoryNested' => array() ))))));
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.4.0 - 5.4.15
Parse error: syntax error, unexpected '1' (T_LNUMBER), expecting ')' in /in/pKR18 on line 36
Process exited with code 255.
Output for 5.3.0 - 5.3.25
Parse error: syntax error, unexpected T_LNUMBER, expecting ')' in /in/pKR18 on line 36
Process exited with code 255.