w3resource

PHP: strspn() function

Description

The strspn() function is used to find the length of the initial segment of a string which matches characters from a second string.

Version:

(PHP 4 and above)

Syntax:

strspn(main_string, search_string, start_position, length)

Parameters:

Name Description Required /
Optional		 Type
main_string The first string. Required String
search_string The searched string. Required String
start_position Sets the starting position of the first string. Negative value counts position from the end of main_string. Optional Integer
length Sets the no. of characters to be checked in the main_string. Optional Integer

Return value:

Returns the length of the initial segment of main_string.

Value Type: Integer

Pictorial Presentation

string_strspn

Example: 

<?php
$string1='W3RESOURCE';
echo strspn($string1, 'W3Res');
?>

Output: 

3

View the example in the browser

See also

PHP Function Reference

Previous: strrpos
Next: strstr



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.