Learn PHP Programming

A backend server scripting language, and a powerful tool for making dynamic and interactive Web pages. Learn each topic with examples and output.

PHP Introduction
Control Structures
Php Forms
Php Advanced

Php Strings

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

Some commonly used functions to manipulate strings.

strlen() - Return the Length of a String

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

str_word_count() - Count Words in a String

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

strrev() - Reverse a String

<?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. If no match is found, it will return FALSE.

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

str_replace() - Replace Text Within a String

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

Now that you have done string functions in Php, let's learn SuperGlobals in php


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