ctype_upper

(PHP 4 >= 4.0.4, PHP 5, PHP 7)

ctype_upperCheck for uppercase character(s)

Опис

bool ctype_upper ( string $text )

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

Параметри

text

The tested string.

Значення, що повертаються

Returns TRUE if every character in text is an uppercase letter in the current locale.

Приклади

Приклад #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";
    }
}
?>

Наведений вище приклад виведе:

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.

Примітки

Зауваження:

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.

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User Contributed Notes 2 notes

up
8
chris at theothernews dot co dot nz
9 years ago
Underscores in the string will result in false, so you have to remove them first.
up
-14
Anonymous
8 years ago
// after screwing around with function.ctype-upper
// I found this simple solution

if (strtolower($string) != $string)// its so simple!
{
  echo "uppercase letters found in $string";
}

source: http://stackoverflow.com/questions/4426327/how-to-detect-if-string-contains-1-uppercase-letter-in-php
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