PHP Loop-For Loop

Loops through a block of code a specified number of times, or when a specified condition is true.

for loop

The for loop is used when you know in advance the number of times the script needs to run.

grammar

 for (initial value; condition; increment){code to be executed;}

parameter:

Initial value : Mainly initializes a variable value, used to set a counter (but can be any code that is executed once at the beginning of the loop).

Condition : Restriction conditions for loop execution. If TRUE, the loop continues. If FALSE, the loop ends.

Increment : Mainly used to increment a counter (but can be any code that is executed at the end of the loop).

Note: The initial value and increment parameters above can be empty, or have multiple expressions (separated by commas).

Example

The following example defines a loop with an initial value of i=1. As long as variable i is less than or equal to 5, the loop will continue to run. Each time the loop runs, variable i will be incremented by 1:

 <?php for ( $i = 1 ; $i <= 5 ; $i ++ ) {    echo " The number is " . $i . " <br> " ; } ?>

Output:

 The number is 1The number is 2The number is 3The number is 4The number is 5

foreach loop

The foreach loop is used to iterate over an array.

grammar

 foreach ($array as $value){ Code to be executed;}

Each time you loop, the value of the current array element is assigned to the $value variable (the array pointer moves one by one), and the next time you loop, you see the next value in the array.

Example

The following example demonstrates a loop that prints the values ​​of a given array:

 <?php $x = array ( " one " , " two " , " three " ) ; foreach ( $x as $value ) {    echo $value . " <br> " ; } ?>

Output:

 onetwothree