PHP Strpos string _php Tutorial by Strpos Find the way string appears

PHP uses Strpos to find the way strings appear, strpos strings

This example describes how PHP finds the location of a string by Strpos. Share to everyone for your reference. The specific analysis is as follows:

Strpos is used to find the first occurrence of a string in another string, Strpos is case-sensitive, and if not found, returns false, so Strpos has two types of return values, one for shaping, and one for bool, which requires attention during development

<?phpecho Strpos ("Hello world!", "Wo");? >

Output results: 6

Since Strpos has two types of return values, it is best to use the = = = three equals sign for strict type equality comparisons when determining if substrings are found.

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

The above code returns the following result

This script would print:not found based (= =) Testfound based (= = =) Test the (= = =) test is correct.

I hope this article is helpful to everyone's PHP programming.

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