Strings

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

String Functions

some commonly used functions

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
        ?>
    

The first character position in a string is 0 (not 1).

---

str_replace() - Replace Text Within a String

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

---