PHP String Manipulation
Master PHP string functions with practical examples for counting, reversing, searching, and replacing text.
📏 1. Get the Length of a String
The strlen() function returns the length of a string in bytes. It is commonly used to validate string constraints.
<?php
// Output: 12
echo strlen("Hello world!");
?>📝 2. Count Words in a String
The str_word_count() function counts the number of words inside a string.
<?php
// Output: 2
echo str_word_count("Hello world!");
?>🔁 3. Reverse a String
The strrev() function reverses the sequence of a string.
<?php
// Output: !dlrow olleH
echo strrev("Hello world!");
?>🔍 4. Search for Text within a String
The strpos() function searches for a specific text within a string and returns the first occurrence's index (0-based).
<?php
// Output: 6
echo strpos("Hello world!", "world");
?>✏️ 5. Replace Text within a String
The str_replace() function replaces specific characters or words with others within a string.
<?php
// Output: Hello Dolly!
echo str_replace("world", "Dolly", "Hello world!");
?>