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  • How to convert a string to uppercase and lowercase?

    @gunjan.tewari
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    Convert a string to uppercase:

    strtoupper() function is used to convert a string to uppercase. It convert all characters of string to uppercase.

    Syntax:

    1. strtoupper(string)

    You have to pass only one parameter to the function i.e., the string which you want to convert to uppercase.

    For example:

    1. <?php
    2. echo strtoupper("Convert this string to uppercase");
    3. ?>

    Convert a string to lowercase:

    strtolower() function is used to convert a string to lowercase. It convert all characters of string to lowercase.

    Syntax:

    1. strtolower(string)

    You have to pass only one parameter to the function i.e., the string which you want to convert to lowercase.

    For example:

    1. <?php
    2. echo strtolower("CONVERT THE STRING TO LOWERCASE");
    3. ?>
    How to convert a string to uppercase and lowercase?
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