PHP stristr() Function
In this chapter you will learn:
- Definition for PHP stristr() Function
- Syntax for PHP stristr() Function
- Parameter for PHP stristr() Function
- Return for PHP stristr() Function
- Note for PHP stristr() Function
- Example - Find the first occurrence of
- Example - Find the ASCII code
- Example - Return the part of the string before the first occurence
Definition
The stristr() function searches for the first occurrence of a string inside another string.
Syntax
PHP stristr() Function has the following syntax.
stristr(string,search,before_search)Parameter
| Parameter | Is Required | Description |
|---|---|---|
| string | Required. | String to search |
| search | Required. | String to search for. If it is a number, it will use it as the ASCII value |
| before_search | Optional. | A boolean value whose default is "false". If set to "true", it returns the part of the string before the first occurrence of the search parameter. |
Return
Returns the rest of the string (from the matching point), or FALSE, if the string to search for is not found.
Note
This function is case-insensitive. For a case-sensitive search, use strstr() function.
Example
Find the first occurrence of "world" inside "Hello world!", and return the rest of the string:
<?php
echo stristr("Hello world!","WORLD");
?>
The code above generates the following result.
Example 2
Search a string for the ASCII value of "o", and return the rest of the string:
<?php
echo stristr("Hello world from java2s.com!",111);
?>
The code above generates the following result.
Example 3
Return the part of the string before the first occurence of "world":
<?php
echo stristr("Hello from java2s.com world!","WORLD",true);
?>
The code above generates the following result.
Next chapter...
What you will learn in the next chapter:
- Definition for PHP strlen() Function
- Syntax for PHP strlen() Function
- Parameter for PHP strlen() Function
- Return for PHP strlen() Function
- Example - Get the string length
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