The array_walk_recursice() function applies a user function recursively to every member of an array.
Syntax
array_walk_recursive(arr, custom_func, parameter)
Parameters
arr − The specified array. Required.
custom_func − The user defined function. Required.
parameter − The parameter to be set for the custom function. Optional.
Return
The array_walk_recursive() function returns TRUE on success or FALSE on failure.
Example
The following is an example −
<?php function display($val,$key) { echo "Key $key with the value $val<br>"; } $arr1 = array("p"=>"accessories","q"=>"footwear"); $arr2 = array($arr1,"1"=>"electronics"); array_walk_recursive($arr2,"display"); ?>
Output
Key p with the value accessories Key q with the value footwear Key 1 with the value electronics
Example
Let us see another example which pass another parameter −
<?php function display($val,$key, $extra) { echo "Key $key $extra $val<br>"; } $arr1 = array("p"=>"accessories","q"=>"footwear"); $arr2 = array($arr1,"5"=>"electronics"); array_walk_recursive($arr2,"display", "with value"); ?>
Output
Key p with the value accessories Key q with the value footwear Key 5 with the value electronics