Please note, this is a STATIC archive of website www.w3resource.com from 19 Jul 2022, cach3.com does not collect or store any user information, there is no "phishing" involved.
w3resource

PHP if / else / elseif statement

Description

The if statement execute a single statement or a group of statements if a certain condition is met. It can not do anything if the condition is false. For this purpose else is used.

Syntax:

if (condition)
   execute statement(s) if condition is true;
else
  execute  statement(s) if condition is false;

Example :

<?php
$overtime=60;
if ($overtime<=50)
{
$pay_amt=1200;
$medical=1000;
echo "Pay Amount : $pay_amt : Medical : $medical";
}
else
{
$pay_amt=2000;
$medical=1500;
echo "Pay Amount : $pay_amt : Medical : $medical";
}
?>

As we have initialized the $overtime value as 60, therefore the else statement will be executed.

View the example in the browser

PHP: elseif statement

Description:

elseif is a combination of if and else. It extends an if statement to execute a single statement or a group of statements if a certain condition is met. It can not do anything if the condition is false.

The following example display 'x is greater than y', 'x is equal to y' or 'x is smaller than y' depends on the value of $x or $y.

Example :

<?php
if ($x > $y) 
{
echo "x is bigger than y"; 
}
elseif ($x == $y)
{
echo "x is equal to y";
} 
else
{
echo "x is smaller than y";
}
?>

PHP: else statement

Description:

The if statement execute a single statement or a group of statements if a certain condition is met. It can not do anything if the condition is false. For this purpose else is used.

Syntax:

if (condition)

   execute statement(s) if condition is true;
  else
  execute  statement(s) if condition is false;

Example: 

<?php
$overtime=60;
if ($overtime<=50)
{
$pay_amt=1200;
$medical=1000;
echo "Pay Amount : $pay_amt : Medical : $medical";
}
else
{
$pay_amt=2000;
$medical=1500;
echo "Pay Amount : $pay_amt : Medical : $medical";
}
?>

As we have initialized the $overtime value as 60, therefore the else statement will be executed.

View the example in the browser

PHP: elseif statement

Description:

elseif is a combination of if and else. It extends an if statement to execute a single statement or a group of statements if a certain condition is met. It can not do anything if the condition is false.

The following example display 'x is greater than y', 'x is equal to y' or 'x is smaller than y' depends on the value of $x or $y.

Example :

<?php
if ($x > $y) 
{
echo "x is bigger than y"; 
}
elseif ($x == $y)
{
echo "x is equal to y";
} 
else
{
echo "x is smaller than y";
}
?>

Previous: Incrementing Decrementing Operators
Next: while statement



PHP: Tips of the Day

How to Sort Multi-dimensional Array by Value?

Try a usort, If you are still on PHP 5.2 or earlier, you'll have to define a sorting function first:

Example:

function sortByOrder($a, $b) {
    return $a['order'] - $b['order'];
}

usort($myArray, 'sortByOrder');

Starting in PHP 5.3, you can use an anonymous function:

usort($myArray, function($a, $b) {
    return $a['order'] - $b['order'];
});

And finally with PHP 7 you can use the spaceship operator:

usort($myArray, function($a, $b) {
    return $a['order'] <=> $b['order'];
});

To extend this to multi-dimensional sorting, reference the second/third sorting elements if the first is zero - best explained below. You can also use this for sorting on sub-elements.

usort($myArray, function($a, $b) {
    $retval = $a['order'] <=> $b['order'];
    if ($retval == 0) {
        $retval = $a['suborder'] <=> $b['suborder'];
        if ($retval == 0) {
            $retval = $a['details']['subsuborder'] <=> $b['details']['subsuborder'];
        }
    }
    return $retval;
});

If you need to retain key associations, use uasort() - see comparison of array sorting functions in the manual

Ref : https://bit.ly/3i77vCC