PHP | ctype_lower() 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_lower() Function.

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

Syntax

Following below is the syntax to use this function -

ctype_lower ( $text );

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Parameter Details

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

Return Value

This function returns TRUE if every character 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.

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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_print() Function.

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