示例#1 一个 ctype_upper() 例子(使用当前默认语言环境) <?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 $test...
以下是判断一个字符串是否全部由字母组成的示例代码: ```php $str = 'HelloWorld'; $allLetters = true; for ($i = 0; $i < strlen($str); $i++) { $char = $str[$i]; if (!ctype_alpha($char)) { $allLetters = false; break; } } if ($allLetters) { echo "全部是字母"; } else...
if (ctype_upper($testcase)) { echo"The string$testcaseconsists of all uppercase letters.\n"; } else { echo"The string$testcasedoes not consist of all uppercase letters.\n"; } } ?> 以上例程会输出: The string AKLWC139 does not consist of all uppercase letters. The string LMNSDO ...
Constants are typed in all-uppercase letters. Caps aren’t required, but it’s another one of those “speak like a PHP programmer” things. You want constants to look different from variables, and using all uppercase names is one way to do that. Constants also don’t have the $ before...
strtoupper() Converts a string to uppercase letters strtr() Translates certain characters in a string substr() Returns a part of a string substr_compare() Compares two strings from a specified start position (binary safe and optionally case-sensitive) substr_count() Counts the number of times...
%x - Hexadecimal number (lowercase letters) %X - Hexadecimal number (uppercase letters) Additional format values. These are placed between the % and the letter (example %.2f): + (Forces both + and - in front of numbers. By default, only negative numbers are marked) ' (Specifies what to...
Checks if letters in given string are all uppercase.Strings\isUpper('a'); // => false Strings\isUpper('z'); // => false Strings\isUpper('B'); // => true Strings\isUpper('HIAN'); // => true Strings\isUpper('HI AN'); // => false Strings\isUpper('HelLO'); // => true...
MbStrtoupper - Make a string uppercase Original : https://www.php.net/manual/en/function.mb-strtoupper.php Returns str with all alphabetic characters converted to uppercase. func Min func Min(arg, arg2 float64) float64 Min - Find lowest value. Original : https://www.php.net/manual/en/...
// Require at least 8 characters...Password::min(8)// Require at least one letter...Password::min(8)->letters()// Require at least one uppercase and one lowercase letter...Password::min(8)->mixedCase()// Require at least one number...Password::min(8)->numbers()// Require at ...
A variable name is any string of letters, numbers and underscores (for example, $example_1). A valid variable name always starts with a letter or an underscore ($example1 or $_example), never with a digit (wrong: $1example). PHP is case-sensitive. The script language dis...