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PHP: ctype_upper - Manual
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ctype_spacectype_upper
(PHP 4 >= 4.0.4, PHP 5)
ctype_upper — Check for uppercase character(s)
说明
bool ctype_upper ( string $text )
Checks if all of the characters in the provided string, text , are uppercase characters.
参数
- text
-
The tested string.
返回值
Returns TRUE if every character in text is an uppercase letter in the current locale.
范例
Example#1 A ctype_upper() example (using the default locale)
<?php
$strings = array( 'AKLWC139' , 'LMNSDO' , 'akwSKWsm' );
foreach ( $strings as $testcase ) {
if ( ctype_upper ( $testcase )) {
echo "The string $testcase consists of all uppercase letters.\n" ;
} else {
echo "The string $testcase does not consist of all uppercase letters.\n" ;
}
}
?> 上例将输出：
The string AKLWC139 does not consist of all uppercase letters. The string LMNSDO consists of all uppercase letters. The string akwSKWsm does not consist of all uppercase letters.
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