Php declare
From w3cyberlearnings
Contents |
declare
declare uses to set execution directives for a block of code.
Syntax
register_tick_function(functionCall); declare(directive); statement
Note
This function may not be available in PHP 6.
Example 1
<?php
function myfunc() {
print "In tick func<br/>";
}
register_tick_function("myfunc");
declare(ticks=4);
for ($i = 0; $i < 10; ++$i) {
echo " {$i} Hello<br/>";
}
?>
Output
0 Hello In tick func 1 Hello 2 Hello In tick func 3 Hello 4 Hello In tick func 5 Hello 6 Hello In tick func 7 Hello 8 Hello In tick func 9 Hello In tick func
Example 2
<?php
function myfunc() {
print "In tick func<br/>";
}
register_tick_function("myfunc");
declare(ticks=3);
for ($i = 0; $i < 10; ++$i) {
echo " {$i} Hello<br/>";
}
?>
Output
0 Hello In tick func 1 Hello In tick func 2 Hello 3 Hello In tick func 4 Hello In tick func 5 Hello 6 Hello In tick func 7 Hello In tick func 8 Hello 9 Hello In tick func In tick func
Example 3: set ticks=2, and called the if statement
<?php
declare(ticks=2);
// A function called on each tick event
function tick_function() {
echo "tick_function() called<br/>";
}
register_tick_function('tick_function');
$a = 1;
if ($a > 0) {
$a += 2;
echo $a;
}
?>
Output
tick_function() called tick_function() called tick_function() called 3tick_function() called tick_function() called tick_function() called tick_function() called
