How to use php strstr function

In PHP, the strstr() function is used to determine whether a string exists in another string. The syntax format is "strstr(string,search,before_search)"; if so, return the string and the remaining part, otherwise returns FALSE.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

strstr() function is a built-in function in PHP . This function searches for the presence of a string in another string; it searches for the first occurrence of that string in another string and displays the latter part. This function is case-sensitive.

Syntax

strstr(string,search,before_search)

Return value: Returns the remaining part of the string (from the matching point). Returns FALSE if the searched string is not found.

Example 1: Determine whether "world" exists in "Hello world!"

<?php
echo strstr("Hello world!","world");
?>

Output:

world!

Example 2: Search a string by the ASCII value of "o" and return the remaining part of the string

<?php
echo strstr("Hello world!",111);
?>

Output:

o world!

Recommended learning:《 PHP video tutorial》

The above is the detailed content of How to use php strstr function. For more information, please follow other related articles on the PHP Chinese website!