strtoupper() to change all lower to uppercase characters
Convert ASCII letters to uppercase
strtoupper() converts ASCII a-z to uppercase. Use mb_strtoupper() for non-ASCII Unicode case conversion.
$value = 'Php Tutorial 2026';
echo strtoupper($value); // PHP TUTORIAL 2026Start with this current pattern. The examples below are retained, corrected where necessary, and expanded for additional variations and output.
$my_str="Hello welcome to plus2net.com";
$my_str=strtoupper($my_str);
echo $my_str;HELLO WELCOME TO PLUS2NET.COM$val=strtoupper($input_sting);Here is an example code.
DEMO
Example 2: Converting User Input to Uppercase for Case-Insensitive Comparison
When comparing user input, converting both inputs to uppercase ensures case-insensitivity:
$input = "hello";
if (strtoupper($input) === strtoupper("HELLO")) {
echo "Inputs match!";
}
Example 3: Converting Multibyte Characters to Uppercase
For handling multibyte characters, use *mb_strtoupper()* instead:
$str = "élève";
echo mb_strtoupper($str); // Outputs: ÉLÈVE
String Functions first letter of every word to capitalize by using ucwords Change all alphabetic chars to lowercase Checking all lower case or upper case chars in a string
Subhendu Mohapatra
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