String Handling in PHP

This section contains the details about String Handling in PHP.

String Handling in PHP

String variable is used for storing characters. PHP have many functions and operators to manipulate string. A string can be used directly in a function or it can be stored in a variable.

Concatenation of String

PHP has only one operator -concatenate operator(.) which is used to put two values together. Given below the example which will give you a clear idea about how to concatenate two string :

<?php
$input_txt1="Hello World!";
$input_txt2="Welcome to PHP world!";
echo $input_txt1 . " " . $input_txt2;
?> 

The output of the above code will be :

Hello World! Welcome to PHP world!

In the above example, you  can see that we use three things to concatenate- two string and a white space between them. 

strlen() function

The strlen() function is used to return the length of the string. Given below the example:

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

strpos() function

The strpos() function is used to search for character within a string. This function return the position of first match. If no match is found, it will return FALSE. For example :

<?php
echo strpos("Hello PHP!","PHP");
?>

The output of the following code is given below :

6

Since index starts with 0 that is why it shows 6. As in normal counting it is at 7th place.