PHP | ctype_upper() Function

PHP ctype_upper() Function


Hello dear readers! welcome back to another edition of our tutorial on PHP. In this tutorial guide, we are going to be discussing about the PHP ctype_upper() Function.

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

Syntax

Following below is the syntax to use this function -

ctype_upper ( $text );

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Parameter Details

Sr.NoParameters & Description
1

text(Required)

The tested string.


Return Value

This 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.

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

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