Php: how to find the position of a string through strpos. strpos string _ PHP Tutorial

Php uses strpos to find the position where a string appears. Php uses strpos to find the position of a string. This document describes how to use strpos to find the position of a string. Share it with you for your reference. Specific php method for finding the position of a string through strpos, strpos string

This example describes how to use strpos to locate a string in php. Share it with you for your reference. The specific analysis is as follows:

Strpos is used to find the position where a string appears for the first time in another string. strpos is case-sensitive. if not found, false is returned. Therefore, strpos has two types of return values: integer, one is the bool type, which requires attention during development.

<?phpecho strpos("Hello world!","wo");?>

Output result: 6

Because strpos has two types of return values, it is best to use === three equal signs to strictly compare the types when determining whether to find the substring.

<?php$haystack = "needle23423432";$pos = strpos($haystack, "needle");if ($pos==false) { print("Not found based (==) test\n");} else { print("Found based (==) test\n");}if ($pos===false) { print("Not found based (===) test\n");} else { print("Found based (===) test\n");}?>

The above code returns the following results:

This script will print: Not found based (==) testFound based (===) test The (===) test is correct.

I hope this article will help you with php programming.

Examples in this article describes how to use strpos to find the position of a string in php. Share it with you for your reference. Details...