Why crash my code?

Using count in the loop it is called each iteration it loops through the code.

Example from php.net:

PHP Code:

<?php
/*
 * This is an array with some data we want to modify
 * when running through the for loop.
 */
$people = array(
    array('name' => 'Kalle', 'salt' => 856412),
    array('name' => 'Pierre', 'salt' => 215863)
);

for($i = 0; $i < count($people); ++$i) {
    $people[$i]['salt'] = mt_rand(000000, 999999);
} 


The above code can be slow, because the array size is fetched on every iteration.
Since the size never changes, the loop be easily optimized by using an intermediate
variable to store the size instead of repeatedly calling count():


This is the correct way of doing it.

PHP Code:

<?php
/*
 * This is an array with some data we want to modify
 * when running through the for loop.
 */
$people = array(
    array('name' => 'Kalle', 'salt' => 856412),
    array('name' => 'Pierre', 'salt' => 215863)
);

$count = count($people);

for($i = 0; $i < $count; ++$i) {
    $people[$i]['salt'] = mt_rand(000000, 999999);
} 


What did you Try? What did you Get? What did you Expect?

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