PHP: strtoupper() function
Description
The strtoupper() function is used to convert all alphabetic characters of a string to uppercase.
Version:
(PHP 4 and above)
Syntax:
strtoupper(string1)
Parameter:
Name | Description | Required / Optional |
Type |
---|---|---|---|
string1 | The input string. | Required | String |
Return value:
The uppercased string.
Value Type: String.
Pictorial Presentation
Example of php strtoupper() function
<?php
$string1="Welcome to w3resource.com";
echo strtoupper($string1);
?>
Output:
WELCOME TO W3RESOURCE.COM
View the example in the browser
See also
Previous: strtolower
Next: strtr
PHP: Tips of the Day
In PHP, there are two versions of logical AND and OR operators.
Operator | True if |
---|---|
$a and $b | Both $a and $b are true |
$a && $b | Both $a and $b are true |
$a or $b | Either $a or $b is true |
$a || $b | Either $a or $b is true |
Note that the && and || opererators have higher precedence than and and or. See table below:
Evaluation | Result of $e | Evaluated as |
---|---|---|
$e = false || true | True | $e = (false || true) |
$e = false or true | False | ($e = false) or true |
Because of this it's safer to use && and || instead of and and or.
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