ctype_alnum
Function • Params and return types changed in PHP 8.0
Check for alphanumeric character(s).
ctype_alnum Function synopsis
ctype_alnum(mixed $text): boolParameters
$text
Typemixed
The tested string.
Return value
Typebool
Returns true if every character in $text is either
a letter or a digit, false otherwise.
When called with an empty string the result will always be false.
Changes to the ctype_alnum Function
PHP 8.0
- Return type added:
bool - Parameter type added for parameter #1 (
$text):mixed
- ctype_alnum($text)
+ ctype_alnum(mixed $text): boolctype_alnum Function Availability
ctype_alnum Function Availability| PHP Version | Availability |
|---|---|
| PHP 8.6Upcoming Release | Yes |
| PHP 8.5Supported (Latest) | Yes |
| PHP 8.4Supported | Yes |
| PHP 8.3Security-Fixes Only | Yes |
| PHP 8.2Security-Fixes Only | Yes |
| PHP 8.1Unsupported | Yes |
| PHP 8.0Unsupported | Yes |
| PHP 7.4Unsupported | Yes |
| PHP 7.3Unsupported | Yes |
| PHP 7.2Unsupported | Yes |
| PHP 7.1Unsupported | Yes |
| PHP 7.0Unsupported | Yes |
| PHP 5.6Unsupported | Yes |
| PHP 5.5Unsupported | Yes |
| PHP 5.4Unsupported | Yes |
| PHP 5.3Unsupported | Yes |