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What are the string functions in PHP?

Saad Akbar

Overview

A string can be defined as a combination of characters. We'll look into some commonly used string functions in PHP.

1.str_word_count()

This function counts the words in a string.

Example

Let's look at the code below:

<?php
echo str_word_count("Learn from Educative!"); // outputs 3
?>

Explanation

There are 3 words in this string "Learn from Educative!".

2.strlen()

This function returns the length of a string.

Example

Let's look at the code below:

<?php
echo strlen("Learn from Educative!"); // outputs 21
?>

Explanation

The length of the string "Learn from Educative!" is returned. In this case, the length returned is 21 characters.

3.strpos()

This function searches the given string from the larger(main) string. Character position of the first match is returned, otherwise, false is returned.

Example

Let's look at the code below:

<?php
echo strpos("Learn from Educative!", "Educative"); // outputs 11
?>

Explanation

The first character position in a string is 0. Keeping this in mind, "Educative" starts from the 11th11_{th} character position in the main string.

4.strrev()

This function will reverse a string.

Example

Let's look at the code below:

<?php
echo strrev("Learn from Educative!"); // outputs !evitacudE morf nraeL
?>

Explanation

It reverses the given string "Learn from Educative!".

5.str_replace()

This function will replace some characters with some other characters in a string.

Example

Let's look at the code below:

<?php
echo str_replace("from", "through", "Learn from Educative!"); // outputs Hello Dolly!
?>

Explanation

It replaces the word "from" with "through" in the string.

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