Core PHP PHP Beginners

PHP Foreach, For and While Loops

Loops are used for executing the same block again and again, till the certain condition is met. The main idea behind the loops is automating the repetitive task within a program to save the effort of the programmer as well as time. PHP supports many types of loops, some are listed below,

  • While: This loop works until condition is true.
  • do…while: This loop executed the block of code then check the condition, if the condition is true then repeated the execution.
  • for: loops through a block until the specified condition reaches.
  • foreach: Loop through the block of code snippet and give each element of an array.
PHP Foreach, For and While Loops

You will also see the example of the foreach() loop at this article, and also learn how it works with our projects.

PHP While Loop

In while loop, first, check the condition. If the given condition is true, the block of code is executed until it evaluates false. If false then the loop will be terminated.

While loop Structure

<?php
while (condition){
  //block of code to be executed;
}
?>

Example:

<?php
$i = 0;
while ($i < 3){

	echo $i + 1 . "<br>";
	$i++;
}
?>

Output

1
2
3

PHP For Loop

For Loop Structure

<?php
for (variable_initialize; condition; variable_increment){
	//code to be executed
}
?>

Summary

Here,

  • for…{} is the loop block
  • In variable initialization, you can initialize a variable like $i=0.
  • on the condition, is evaluated the condition for each PHP execution, if it getting true then the loop is terminated.
  • variable_increment, is used for variable initial value counter.

Example

<?php
for($i=1; $i<=4; $i++){
    echo $i . "<br>";
}
?>

Output

1
2
3
4

PHP foreach Loop

Structure

foreach ($variable as $key => $value) {
    # code...
}

In foreach() loop, $variable is an array element. Loop through the block of code snippet and give each element of an array.

Example:

<?php 
$UserDetails = array( 
    "name" => "PHPCODER", 
    "email" => "phpcodertech@mail.com", 
    "age" => 25, 
    "gender" => "male"
  
); 
// Loop through UserDetails array 
foreach($UserDetails as $key => $value) { 
    echo $key . ": " . $value . "<br>"; 
} 
  
?> 

Output:

name: PHPCODER
email: phpcodertech@mail.com
age: 25
gender: male

Also Check:

Happy Coding..!

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