PHP Array function-array_ map ()

PHP Array function-array_map ()

The Array_map () function returns an array after the user-defined function is functional. Parameters accepted by the callback function

The number should be and the number of arrays passed to the Array_map () function has been.

Array_map (Function,array1,array2,array3 ...);

Function: Required. User-defined function name, or null

Array1: Required. Specify array

Array2: Optional. Specify array

ARRAY3: Optional. Specify array

function myfunction ($v) {
if ($v = = = ' Dog ') {
return ' Fido ';
}
return $v;
}
$a = array(' Horse ', ' Dog ', ' Cat ');
Print_r (array_map(' myfunction ',$a));
?>

Output: Array ([0] = Horse [1] = Fido [2] = = Cat)

Use multiple parameters:

function myfunction ($v 1,$v 2) {
if ($v 1 = = = $v 2) {
return "Same";
}Else{
return "Different";
}
}
$a 1 = array("Horse", "Dog", "Cat");
$a 2 = array("Cow", "Dog", "Rat");
Print_r (array_map(' myfunction ',$a 1,$a 2));
?>

Output: Array ([0] = different [1] = same [2] = different)

When the custom function name is set to null:

$a 1 = array("Dog", "Cat");
$a 2 = array("Puppy", "Kitten");
Print_r (array_map(null,$a 1,$a 2));
?>

Output: Array ([0] = = Array ([0] = Dog [1] = = Puppy) [1] = =

Array ([0] = Cat [1] = Kitten))

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