PHP Array Function Array_walk Usage example _php tips

This article illustrates the use of PHP array function array_walk. Share to everyone for your reference, specific as follows:

$words =array ("L" => "Lemon", "O" => "Orange", "B" => "banana", "a" => "Apple");
Defines a callback function that outputs an array element
function Words_print ($value, $key, $prefix) {
  echo $prefix: $key => $value <br>\n ";
}
//Define a callback function to directly change the value of the element function
words_alter (& $value, $key) {
  $value =ucfirst ($value);
  $key =strtoupper (key);
}
The value of the output element
Array_walk ($words, ' words_print ', ' words ');
Change the value of the element
Array_walk ($words, ' words_alter ');
echo "<pre>";
Print_r ($words);
echo "</pre>";

Example of an internal call to a class:

Class Arraywalk {
  /**
  * Properties:
  *
  /var $body _chunk = Array (' 0 ' => ' Dewen ', ' 1 ' => ' PHP ', 2=> ') Linux ');
  //VARIABLE METHODS
  //////////////////////////////////
  function Arraywalk () {
  }
  function Func_1 () {
  print_r ($this->body_chunk);
  Array_walk ($this->body_chunk, Array ($this, ' spellstrtolower '));
  Print_r ($this->body_chunk);
  Function Spellstrtolower (& $str) {
    $str = Strtolower ($STR);
  }
}
$obj = new Arraywalk ();
Echo ' <PRE> ';
$obj->func_1 ();
Echo ' </PRE> ';

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