PHP String Functions

Learn PHP Programming Language PHP String Functions

In this lesson, you will learn about String Functions in PHP, their usage, and examples to better understand the topic.

PHP String Functions

Here we will examine a few frequently used functions for manipulating strings.

strlen()
str_word_count()
strrev()
strpos()
str_replace()

strlen()

The PHP method returns the length of a String with strlen()

$stringVar1="This is PHP Tutorial";
echo strlen($stringVar1);

Output

str_word_count()

This PHP method counts the words in a string

$stringVar1="This is PHP Tutorial";
echo str_word_count($stringVar1);

Output

strrev()

A string is reversed using the PHP strrev() function.

$stringVar1="This is PHP Tutorial";
echo strrev($stringVar1);

Output

lairotuT PHP si sihT

strpos()

The PHP strpos() method looks for a particular text within a string. The function returns the first match’s character position if a match is discovered. It will return FALSE if no match is found.

$stringVar1="This is PHP Tutorial";
echo strpos($stringVar1,"is");

Output

is 2

str_replace()

The PHP str replace() function swaps some characters in a string for other characters.

$stringVar1="This is PHP Tutorial";
echo str_replace("Tutorial", "Lesson", "PHP Tutorial!");

Output

PHP Lesson!.

Example of String Functions in PHP

<!DOCTYPE html>
<html>
<body>
<?php
$stringVar1 = "This is PHP Tutorial";
echo strlen($stringVar1) . "<br>";

echo str_word_count($stringVar1) . "<br>";
echo strrev($stringVar1) . "<br>";
echo strpos($stringVar1, "is") . "<br>";
echo str_replace("Tutorial", "Lesson", "PHP Tutorial!"); // outputs PHP Lesson!

?>
</body>
</html>

Output

20
4
lairotuT PHP si sihT
2
PHP Lesson!

This concludes the PHP String Functions lesson. In the next class, you will learn about PHP Forms and their usage.

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