PHP String Variables

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A string variable is used to store and manipulate text.

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String Variables in PHP

String variables are used for values that contain characters.

In this chapter we are going to look at the most common functions and operators used to manipulate strings in PHP.

After we create a string we can manipulate it. A string can be used directly in a function or it can be stored in a variable.

Below, the PHP script assigns the text "Hello World" to a string variable called $txt:

php code

$txt="Hello World";
echo $txt;

The output of the code above will be:

OUTPUT
Hello World

Now, lets try to use some different functions and operators to manipulate the string.

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The Concatenation Operator

There is only one string operator in PHP.

The concatenation operator (.)  is used to put two string values together.

To concatenate two string variables together, use the concatenation operator:

<?php

 $txt1="Hello World!";

 $txt2="What a nice day!";

 echo $txt1 . " " . $txt2;

?> 

If we look at the code above you see that we used the concatenation operator two times. This is because we had to insert a third string (a space character), to separate the two strings.