Strings in PHP: Manipulation and Examples

PHP data types are used to hold different types of data or values. PHP supports the following data types:

• String
• Integer
• Float
• Boolean
• Array
• Object
• NULL
• Resource

PHP String

A string is a sequence of characters, like "Hello world!".

A string can be any text inside quotes. You can use single or double quotes:

Example code:

<span class="pln">
</span><span class="pun">&lt;?</span><span class="pln">php

$x </span><span class="pun">=</span><span class="pln"> </span><span class="str">"Hello world!"</span><span class="pun">;</span><span class="pln">
$y </span><span class="pun">=</span><span class="pln"> </span><span class="str">'Hello world!'</span><span class="pun">;</span><span class="pln">

echo $x</span><span class="pun">;</span><span class="pln">
echo </span><span class="str">"&lt;br&gt;"</span><span class="pun">;</span><span class="pln">
echo $y</span><span class="pun">;</span><span class="pln">

</span><span class="pun">?&gt;</span><span class="pln">

</span>

Output:

The above code will produce the following result-

<span class="pln">
</span><span class="typ">Hello</span><span class="pln"> world</span><span class="pun">!</span><span class="pln">
</span><span class="typ">Hello</span><span class="pln"> world</span><span class="pun">!</span><span class="pln">
</span>

PHP Resource

The special resource type is not an actual data type. It is the storing of a reference to functions and resources external to PHP.

A common example of using the resource data type is a database call.

We will talk about the resource type in advanced topic.