register_tick_function

(PHP 4 >= 4.0.3, PHP 5, PHP 7, PHP 8)

register_tick_function — Enregistre une fonction exécutée à chaque tick

Description

function register_tick_function(callable $callback, mixed ...$args): bool

register_tick_function() enregistre la fonction callback pour être exécutée à chaque fois qu'un tick survient.

Liste de paramètres

callback

La fonction à enregistrer.

args

Valeurs de retour

Cette fonction retourne true en cas de succès ou false si une erreur survient.

Exemples

Exemple #1 Exemple avec register_tick_function()

<?php
declare(ticks=1);

function my_tick_function($param) {
    echo "Fonction de rappel tick appelée avec le paramètre : $param\n";
}

register_tick_function('my_tick_function', true);
?>

Voir aussi

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User Contributed Notes 2 notes

up
2
Carlos Granados
9 years ago
A working example with variable input for validating the asymptotic analysis of your algorithm:

<?php

$n = 1000; // Size of your input

declare(ticks=1);

class Counter {
    private $counter = 0;

    public function increase()
    {
        $this->counter++;
    }
    
    public function print()
    {
        return $this->counter;    
    }
}

$obj = new Counter;

register_tick_function([&$obj, 'increase'], true);

for ($i = 0; $i < 100; $i++)
{
    $a = 3;
}

// unregister_tick_function([&$obj, 'increase']);
// Not sure how to de-register, you can use static methods and members in the Counter instead.

var_dump("Number of basic low level operations: " . $obj->print());

?>
up
0
Peter Featherstone
9 years ago
Due to an implementation bug, the declare(ticks=1) directive leaked into different compilation units prior to PHP 7.0. This is not how declare() directives, which are per-file or per-scope, are supposed to work.

Therefore there are different implementations between PHP 5.6 and the correct implementation has been added in PHP 7.0. This means the below script will return different results

#index.php

<?php

declare(ticks=1);
$count = 0;

register_tick_function('ticker');
function ticker() {
  global $count;
  $count++;
}

?>

#inc.php

<?php

$baz = "baz";
$qux = "qux";

?>

Running php index.php in the terminal gives:

    PHP 5.6 - 7
    PHP 7.0 - 5
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