How to get all the possible K length Substrings in a String in PHP - Step by Step Examples

How to get all the possible K length Substrings in a String in PHP ?

Answer

To get all the possible K length substrings in PHP, you can use nested loops to iterate through the string and extract substrings of the desired length.

✐ Examples

1 Get All Possible K Length Substrings

In this example,

We create a string named $str with a string value and an integer $k representing the length of substrings.
We initialize an empty array $substrings to store the K length substrings.
We use a for loop to iterate over the string from the start to the position where the remaining characters are at least $k.
Inside the outer loop, we use the substr function to extract a substring of length $k starting from the current position.
We store each extracted substring in the $substrings array.
Finally, we print the substrings to standard output.

PHP Program

<?php
$str = "Hello World";
$k = 3;
$substrings = array();
for ($i = 0; $i <= strlen($str) - $k; $i++) {
    $substring = substr($str, $i, $k);
    array_push($substrings, $substring);
}
print_r($substrings);
?>

Output

Array
(
    [0] => Hel
    [1] => ell
    [2] => llo
    [3] => lo 
    [4] => o W
    [5] =>  Wo
    [6] => Wor
    [7] => orl
    [8] => rld
)

2 Get All Possible K Length Substrings from Another String

In this example,

We create a string named $str with a different string value and an integer $k representing the length of substrings.
We initialize an empty array $substrings to store the K length substrings.
We use a for loop to iterate over the string from the start to the position where the remaining characters are at least $k.
Inside the outer loop, we use the substr function to extract a substring of length $k starting from the current position.
We store each extracted substring in the $substrings array.
Finally, we print the substrings to standard output.

PHP Program

<?php
$str = "abcdef";
$k = 2;
$substrings = array();
for ($i = 0; $i <= strlen($str) - $k; $i++) {
    $substring = substr($str, $i, $k);
    array_push($substrings, $substring);
}
print_r($substrings);
?>

Output

Array
(
    [0] => ab
    [1] => bc
    [2] => cd
    [3] => de
    [4] => ef
)

Summary

In this tutorial, we learned How to get all the possible K length Substrings in a String in PHP language with well detailed examples.

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