How to pass input value as array instead of passing only one value where array_walk is used in PHP?

How to pass input value as array instead of passing only one value where array_walk is used in PHP?

By : saqib
Date : November 21 2020, 04:01 AM
wish help you to fix your issue I just slightly modified my code I answered your previous question with.
Added a foreach to loop the words.
code :
$rule = 
"c" => "d",
"a" => "o",
"t" => "g",
"h" => "a",
"1" => "@",
"e" => "n",
"n" => "t"
$orders = ['cat1hen','cathen','hencat'];

foreach($orders as $order){
    $arr = str_split($order);

    $str ="";
    foreach($arr as $key){
        $str .= $rule[$key];

    $str = preg_replace("/(.*?)(@)(.)(.*)/", "$1$3$2$4", $str);
    echo $str . "\n";


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Pass-by-reference the third parameter in PHP array_walk, without a warning

Pass-by-reference the third parameter in PHP array_walk, without a warning

By : Ter Inexora Blr
Date : March 29 2020, 07:55 AM
it should still fix some issue The third parameter to array_walk isn't passed by reference so that's not going to work. Instead of a function, you can use an object method as a callback and accumulate the results in the object.
code :
Class myClass
 public values;
 public function myCallback($value,$key)
   if (strlen($value)<=2){
       $this->values[] = $key.$value;
$a = array("aa", "bbb", "cc", "dd");
$obj = new myClass();
array_walk($a, array($obj,'myCallback'));
function myFunction($value, $key)
   global $array;    
   if (strlen($value)<=2) $array[] = $key.$value;
how to pass more arguments to php array_walk?

how to pass more arguments to php array_walk?

By : user2873181
Date : March 29 2020, 07:55 AM
may help you . The third parameter is a mixed data type. If you have many parameters, I would suggest putting them into an Array - perhaps an associative array to name them. You'd then pull them back out of that param:
code :
$addresses = array('www.google.com', 'www.yahoo.com', 'www.microsoft.com');
$params = array('first','second');
array_walk($addresses, array($this, '_handle'), $params);

private function _handle($address,$count, $params) {
       echo $address; // www.google.com
       echo $params[0]; // first
       echo $params[1]; // second
Empty array after passing array by reference to array_walk()

Empty array after passing array by reference to array_walk()

By : user543169
Date : March 29 2020, 07:55 AM
wish of those help Take a better look at array_walk's documentation page.
code :
class Analyzer {
    public static function analyze($phrases) {
        $arrObj = new ArrayObject();
        array_walk($phrases, array('self', 'splitByLength'), $arrObj);

    private static function splitByLength($item, $key, $arrObj) {
        // line stolen from here: http://stackoverflow.com/a/4786840/603003
        // thanks to arnaud576875 <http://stackoverflow.com/users/576875/arnaud576875>
        $len = count( preg_split('#\PL+#u', $item, -1, PREG_SPLIT_NO_EMPTY) );
        if (!isset($arrObj[$len])) {
            $arrObj[$len] = array();
        $arrObj[$len][] = $item;

$static = get_called_class();
array_walk($phrases, function($item, $key) use($static, &$sortedPhrases){
  $static::splitByLength($item, $key, $sortedPhrases);
Passing userdata to array_walk and reference to self

Passing userdata to array_walk and reference to self

Date : March 29 2020, 07:55 AM
around this issue I have to filter multidimensional array by searched keyword. , You need to use the use keyword.
code :
array_walk($lists, function (&$value, $index) use ($search) {
Error passing method to array_walk

Error passing method to array_walk

By : user2009644
Date : March 29 2020, 07:55 AM
help you fix your problem To pass a class method to a function, you use array(object, methodname):
code :
array_walk($production, array($this, 'increase'));
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