PHP
PHP Ajax Tutorial with Example
What is Ajax? AJAX full form is Asynchronous JavaScript & XML. It is a technology that reduces the...
A control structure is a block of code that decides the execution path of a program depending on the value of the set condition.
Let’s now look at some of the control structures that PHP supports.
Syntax The syntax for if… then… else is;
<?php if (condition is true) { block one else block two } ?>
HERE,
How it works The flow chart shown below illustrates how the if then… else control structure works
Let’s see this in action The code below uses “if… then… else” to determine the larger value between two numbers.
<?php $first_number = 7; $second_number = 21; if ($first_number > $second_number){ echo "$first_number is greater than $second_number"; }else{ echo "$second_number is greater than $first_number"; } ?>
Output:
21 is greater than 7
It only executes a single block of code depending on the value of the condition.
If no condition has been met then the default block of code is executed.
It has the following basic syntax.
<?php switch(condition){ case value: //block of code to be executed break; case value2: //block of code to be executed break; default: //default block code break; } ?>
HERE,
How it works
The flow chart shown below illustrates how the switch control structure works
Practical example
The code below uses the switch control structure to display a message depending on the day of the week.
<?php $today = "wednesday"; switch($today){ case "sunday": echo "pray for us sinners."; break; case "wednesday": echo "ladies night, take her out for dinner"; break; case "saturday": echo "take care as you go out tonight."; break; default: echo "have a nice day at work"; break; } ?>
Output:
ladies night, take her out for dinner
Summary
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