PHP | ctype_upper() Function

Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP ctype_upper() Function.

The PHP ctype_upper() function checks if all characters in the given string, text, are uppercase characters.

Syntax

Following below is the syntax to use this function -

ctype_upper ( $text );

READ: PHP | ctype_space() Function

Parameter Details

Sr.No	Parameters & Description
1	text(Required) The tested string.

Return Value

This built-in PHP function returns TRUE if every character in the text is an uppercase character in the current locale.

Example

Try out the below example -

<?php
   $strings = array('test12345', 'ABCEFG');
   
   foreach ($strings as $test) {
      if (ctype_upper($test)) {
         echo "$test consists of all uppercase letters. \n";
      }else {
         echo "$test does not have all uppercase letters. \n";
      }
   }
?> 

Output

When the above code is executed, it will produce the following result -

test12345 does not have all uppercase letters.
ABCEFG consists of all uppercase letters.

READ: PHP | ctype_punct() Function

Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we are going to be discussing about the PHP ctype_xdigit() Function.

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