w3resource

PHP: strstr() function

Description

The strstr() function is used to get the first occurrence of a string inside another string.

This function is case-sensitive.

Version:

(PHP 4 and above)

Syntax:

strstr(string_name, search_string, before_search) 

Parameters:

Name Description Required /
Optional
Type
string_name The input string. Required String
search_string The string to search for. Required Mixed*
before_search Returns the part of the string_name before the first occurrence of the search_string when true. Optional Boolean

*Mixed: Mixed indicates that a parameter may accept multiple (but not necessarily all) types.

Return value:

The portion of the string, or false if search_string is not found.

Value Type: String.

Pictorial Presentation

string_strstr

Example:

<?php
$string1="W3RESOURCE.COM";
$newstring=strstr($string1,".");
echo $newstring;
?>

Output:

.COM

View the example in the browser

See also

PHP Function Reference

Previous: strspn
Next: strtolower



PHP: Tips of the Day

$_GET: An associative array of variables passed to the current script via the URL parameters

$_GET is an array that contains all the URL parameters; these are the whatever is after the ? in the URL.

Using http://www.example.com/index.php?myVar=myVal as an example. This information from this URL can be obtained by accessing in this format $_GET["myVar"] and the result of this will be myVal.

Using some code for those that don't like reading.

Example:

<?php
// URL = http://www.example.com/index.php?myVar=myVal
echo $_GET["myVar"] == "myVal" ? "true" : "false"; // returns "true"
?>

Output:

false

The above example makes use of the ternary operator.

This shows how you can access the value from the URL using the $_GET superglobal.

Now another example! gasp

// URL = http://www.example.com/index.php?myVar=myVal&myVar2=myVal2
echo $_GET["myVar"]; // returns "myVal"
echo $_GET["myVar2"]; // returns "myVal2"

Output:


It is possible to send multiple variables through the URL by separating them with an ampersand (&) character.

Security risk

It is very important not to send any sensitive information via the URL as it will stay in history of the computer and will be visible to anyone that can access that browser.