IntlChar::islower
PHP function
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(PHP 7, PHP 8)
Check if code point is a lowercase letter
Description
IntlChar::islower(int|string $codepoint): bool|null
Determines whether the specified code point has the general category "Ll" (lowercase letter).
Note
This misses some characters that are also lowercase but have a different general category value. In order to include those, use IntlChar::isULowercase().
Parameters
codepointParameter
Return Values
Returns true if codepoint is an Ll lowercase letter, false if not. Returns null on failure.
Examples
Example
php
<?php
var_dump(IntlChar::islower("A"));
var_dump(IntlChar::islower("a"));
var_dump(IntlChar::islower("Φ"));
var_dump(IntlChar::islower("φ"));
var_dump(IntlChar::islower("1"));
?>The above example will output:
output
bool(false)
bool(true)
bool(false)
bool(true)
bool(false)See Also
IntlChar::isupper()IntlChar::istitle()IntlChar::tolower()IntlChar::toupper()IntlChar::PROPERTY_LOWERCASEctype_lower()