for

while
November 13, 2018
foreach
November 14, 2018

for loops are the most complex loops in PHP. They behave like their C counterparts. The syntax of a for loop is:

for (expr1; expr2; expr3)
    statement

The first expression (expr1) is evaluated (executed) once unconditionally at the beginning of the loop.

In the beginning of each iteration, expr2 is evaluated. If it evaluates to TRUE, the loop continues and the nested statement(s) are executed. If it evaluates to FALSE, the execution of the loop ends.

At the end of each iteration, expr3 is evaluated (executed).

Each of the expressions can be empty or contain multiple expressions separated by commas. In expr2, all expressions separated by a comma are evaluated but the result is taken from the last part. expr2 being empty means the loop should be run indefinitely (PHP implicitly considers it as TRUE, like C). This may not be as useless as you might think, since often you’d want to end the loop using a conditional break statement instead of using the for truth expression.

Consider the following examples. All of them display the numbers 1 through 10:

<?php
/* example 1 */
for ($i = 1; $i <= 10; $i++) {
echo $i;
}

/* example 2 */

for ($i = 1; ; $i++) {
if ($i > 10) {
break;
}
echo $i;
}

/* example 3 */

$i = 1;
for (; ; ) {
if ($i > 10) {
break;
}
echo $i;
$i++;
}

/* example 4 */

for ($i = 1, $j = 0; $i <= 10; $j += $i, print $i, $i++);
?>

Sondiva Technologies
Sondiva Technologies
Sondiva Technologies started in 2011 with a vision of providing Quality based Web Hosting and Web Designing Services in Ghaziabad, Delhi NCR. Backed up by full stack developers and designers , with over 500+ Web Projects. They work on opensource Platforms like Wordpress, Magneto, Prestashop, Opencart and Core PHP. Other services are : Responsive Web Designing Domain Registration Services Dedicated & SSD Hosting Virtual Private Servers Google GSuite Mail Servers E-Commerce Shopping Portal Development Web Designing & Application Courses SEO & Digital Marketing

Leave a Reply

Your email address will not be published. Required fields are marked *

Shop Now