The IntlChar::islower() function is an inbuilt function in PHP which is used to check whether the given input character is a lowercase character or not.
Syntax:
bool IntlChar::islower( $codepoint )
Parameter: This function accepts a single parameter $codepoint which is mandatory. The input parameter is a character, which is encoded as a UTF-8 string.
Return Value: If $codepoint is a lowercase character then it returns True, otherwise return False.
Below programs illustrate the IntlChar::islower() function in PHP:
Program 1:
PHP
<?php// PHP code to illustrate IntlChar::islower()// function // Input data is character typevar_dump(IntlChar::islower("a"));var_dump(IntlChar::islower("A"));var_dump(IntlChar::islower("\u{0041}")); // Input data is control charactervar_dump(IntlChar::islower("\t")); // Input data is string type var_dump(IntlChar::islower("Geeksforneveropen")); // Input data is number typevar_dump(IntlChar::islower("2018")); // Input data is single digitvar_dump(IntlChar::islower("5"));?> |
Output:
bool(true) bool(false) bool(false) bool(false) NULL NULL bool(false)
Note: If String and Numbers (except single digit number) are used as a parameter then it returns NULL.
Program 2:
PHP
<?php// PHP code to illustrate IntlChar::islower() // Declare an array $arr$arr = array("a", "\u{FF41}", "A", "\u{0041}", "0", "\n", "123", "Geeks");// \u{0041} is ASCII value of 'A'// \u{FF41} is ASCII value of 'a'// Loop run for every array elementforeach ($arr as $val){ // Check each element as code point data var_dump(IntlChar::islower($val));}?> |
Output:
bool(true) bool(true) bool(false) bool(false) bool(false) bool(false) NULL NULL
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