PHP Strings

PHP String Functions

strlen() - Return the Length of a String

The PHP strlen() function returns the length of a string.

Example

Return the length of the string "Hello world!":

<?php
echo strlen("Hello world!"); // outputs 12?>

str_word_count() - Count Words in a String

The PHP str_word_count() function counts the number of words in a string.

Example

Count the number of word in the string "Hello world!":

<?php
echo str_word_count("Hello world!"); // outputs 2?>

strrev() - Reverse a String

The PHP strrev() function reverses a string.

Example

<?php

echo strrev("Hello world!"); // outputs !dlrow olleH

?>

strpos() - Search For a Text Within a String

The PHP strpos() function searches for a specific text within a string. If a match is found, the function returns the character position of the first match.

Example

Search for the text "world" in the string "Hello world!":

<?php
echo strpos("Hello world!", "world"); // outputs 6?>

str_replace() - Replace Text Within a String

The PHP str_replace() function replaces some characters with some other characters in a string.

Example

Replace the text "world" with "Dolly":

<?php
echo str_replace("world", "Dolly", "Hello world!"); // outputs Hello Dolly!?>