We are given two strings.We have to check whether the second string is a sub-string of the first string or not using PHP inbuilt function strpos().
Input :$s1 = "geeksforgeeks" $s2 = "for" Output : True Explanation : The string "for" is a substring of the string Matthew so output is true. Input :$s1 = "practice.geeksforgeeks" $s2 = "quiz" Output : False
The problem can be solved by iterating through the given string from 0 index to final length of the string and comparing the query string with the iterations. But in PHP we can also make use of some inbuilt functions to solve this particular problem.
- strpos(): This function finds the position of the first occurrence of a string inside another string.
- strlen() : Returns length of string.
If the index of first occurrence of the given string is within the length indices of the given string then the output returns true else the output returns false.
<?php // PHP code to check if a string is // substring of other $s1 = "geeksforgeeks"; $s2 = "geeks"; if (strpos($s1, $s2) >= 0 && strpos($s1, $s2) < strlen($s1)) echo("True"); else echo("False"); ?>
If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to email@example.com. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.
- PHP | Find the number of sub-string occurrences
- PHP | imagefilledrectangle() Function
- PHP | imagefill() Function
- How to get the first element of an array in PHP?
- PHP | imagecreatetruecolor() Function
- PHP | gd_info() Function
- How to convert a string into number in PHP?
- Program to find the number of days between two dates in PHP
- PHP | date_timezone_set() Function
- PHP | timezone_transitions_get() Function