PHP | ctype_lower() 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_lower() Function.

The PHP ctype_lower() function checks if all the characters in the given string, text, are lowercase letters.

Syntax

Following below is the syntax to use this function -

ctype_lower ( $text );

READ: PHP | ctype_digit() Function

Parameter Details

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

Return Value

This built-in function returns TRUE if all the characters in the text is a lowercase letter in the current locale.

Example

Try out the below example -

<?php
   $strings = array('aac123', 'testing', "testin IS Done");
   
   foreach ($strings as $test) {
      if (ctype_lower($test)) {
         echo "$test consists of all lowercase letters. \n";
      }else {
         echo "$test does not have all lowercase letters. \n";
      }
   }
?> 

Output

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

aac123 does not have all lowercase letters.
testing consists of all lowercase letters.
testin IS Done does not have all lowercase letters.

READ: PHP | ctype_graph() 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_print() Function.

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