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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

PHP - how to create a newline character?

Only double quoted strings interpret the escape sequences \r and \n as '0x0D' and '0x0A' respectively, so you want:

"\r\n"

Single quoted strings, on the other hand, only know the escape sequences \\ and \'.

So unless you concatenate the single quoted string with a line break generated elsewhere (e. g., using double quoted string "\r\n" or using chr function chr(0x0D).chr(0x0A)), the only other way to have a line break within a single quoted string is to literally type it with your editor:

$s = 'some text before the line break
some text after';

Make sure to check your editor for its line break settings if you require some specific character sequence (\r\n for example).

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