What are the string functions in PHP?

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:

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:

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:

Explanation

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

4.strrev()

This function will reverse a string.

Example

Let's look at the code below:

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:

Explanation

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