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";
}
?>

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Next: while statement



PHP: Tips of the Day

Returns the first string there is between the strings from the parameter $start and $end

Example:

<?php
function tips_firstStringBetween($haystack, $start, $end)
{
  return trim(strstr(strstr($haystack, $start), $end, true), $start . $end);
}

print(tips_firstStringBetween('This is a [PHP] tips of the day', '[', ']'));
?>

Output:

PHP