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ctype_lower

ctype_lower

(PHP 4 >= 4.0.4, PHP 5)

ctype_lowerCheck for lowercase character(s)

说明

bool ctype_lower ( string $text )

Checks if all of the characters in the provided string, text, are lowercase letters.

参数

text

The tested string.

返回值

Returns TRUE if every character in text is a lowercase letter in the current locale.

范例

Example #1 A ctype_lower() example (using the default locale)

<?php
$strings 
= array('aac123''qiutoas''QASsdks');
foreach (
$strings as $testcase) {
    if (
ctype_lower($testcase)) {
        echo 
"The string $testcase consists of all lowercase letters. ";
    } else {
        echo 
"The string $testcase does not consist of all lowercase letters. ";
    }
}
?>

以上例程会输出:

The string aac123 does not consist of all lowercase letters.
The string qiutoas consists of all lowercase letters.
The string QASsdks does not consist of all lowercase letters.

注释

Note:

If an integer between -128 and 255 inclusive is provided, it is interpreted as the ASCII value of a single character (negative values have 256 added in order to allow characters in the Extended ASCII range). Any other integer is interpreted as a string containing the decimal digits of the integer.

参见


  • ctype_alnum
  • ctype_alpha
  • ctype_cntrl
  • ctype_digit
  • ctype_graph
  • ctype_lower
  • ctype_print
  • ctype_punct
  • ctype_space
  • ctype_upper
  • ctype_xdigit
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