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Write a PHP function isLetter($ch) that takes a character as a parameter and returns true if the character is in the range of A-Z or a-z. You may not use the function ctype_alpha(). HINT: use the ord() function and test ranges.

Write a PHP function isLetter($ch) that takes a character as a parameter and returns true if the character is in the range of A-Z or a-z. You may not use the function ctype_alpha(). HINT: use the ord() function and test ranges.

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Write an isLetter Function

Write a PHP function isLetter($ch) that takes a character as a parameter and returns true if the character is in the range of A-Z or a-z. You may not use the function ctype_alpha(). HINT: use the ord() function and test ranges.

```php <?php function isLetter($ch){ } ?> ``` This PHP code snippet defines a function named `isLetter`. The function takes a single parameter, `$ch`, but the function's body is currently empty, meaning no operations or checks are performed yet. In a complete implementation, this function could be designed to check whether the character passed to it is a letter and return a corresponding boolean value.
Transcribed Image Text:```php <?php function isLetter($ch){ } ?> ``` This PHP code snippet defines a function named `isLetter`. The function takes a single parameter, `$ch`, but the function's body is currently empty, meaning no operations or checks are performed yet. In a complete implementation, this function could be designed to check whether the character passed to it is a letter and return a corresponding boolean value.
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