Description ¶ Returns string with all alphabetic characters converted to uppercase.

How can you tell if a character is uppercase or lowercase in PHP?

The ctype_upper() function in PHP used to check each and every character of a given string is in uppercase or not. If the string in upper case then it returns TRUE otherwise returns False.

How can you tell if characters are lowercase?

Use islower() and isupper() to check if a string is upper, lower, or mixed case. Call str. islower() with str as a string to determine if str is all lowercase.

How to capitalize a string in PHP?

strtoupper() function– For making a PHP string uppercase (all letters in the string) strtolower() function – that converts a specified string to lowercase letters. ucwords() – camel cased i.e. capitalizes the first letter of each word in a string. For making the first letter of a string capital, use the ucfirst() function of PHP.

Does strtoupper capitalize accented letters in PHP?

PHP’s strtoupper () capitalizes non-accented letters but leaves accented letters lowercase PHP’s mb_strtoupper () will capitalize accented letters when you include an encoding parameter CSS’s text-transform: uppercase capitalizes all text, including accented letters

How to make a string uppercase or lowercase in PHP?

PHP provides built-in functions for that. The functions are listed below which is followed by examples of using them. strtoupper() function– For making a PHP string uppercase (all letters in the string) strtolower() function – that converts a specified string to lowercase letters.

What is the strtoupper() function in PHP?

PHP strtoupper () Function 1 Definition and Usage. The strtoupper () function converts a string to uppercase. Note: This function is binary-safe. 2 Syntax 3 Parameter Values 4 Technical Details