w3resource

PHP: substr_count() function

Description

The substr_count() function is used to count the number of times a substring occurs in a string. Note that substring is case sensitive.

Version:

(PHP 4 and above)

Syntax:

substr_count(string1, string2, nstart, nlength)

Parameters:

Name Description Required /
Optional		 Type
string1 The string to search in. Required String
string2 The substring to search for. Required String
nstart The position where string to start searching. Optional Integer
nlength The length of the string to be searched for. Optional Integer

Return value:

Returns a number.

Value Type: Integer.

Pictorial Presentation

string_substr_count

Example: 

<?php
$string1="Welcome to w3resource.com";
echo substr_count($string1,'co'); 
echo substr_count($string1,'co',4); 
echo substr_count($string1,'co',4,4); 
?>

Output: 

2
1
0

View the example in the browser

See also

PHP Function Reference

Previous: substr_compare
Next: substr_replace



PHP: Tips of the Day

Get the full URL in PHP

Have a look at $_SERVER['REQUEST_URI'], i.e.

Example:

$actual_link = "http://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

(Note that the double quoted string syntax is perfectly correct)

If you want to support both HTTP and HTTPS, you can use

$actual_link = (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? "https" : "http") . "://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";

Editor's note: using this code has security implications. The client can set HTTP_HOST and REQUEST_URI to any arbitrary value it wants.

Ref : https://bit.ly/2ZYItNJ