PHP IntlChar enumCharTypes()用法及代碼示例

IntlChar::enumCharTypes()函數是PHP中的內置函數，用於提供所有代碼點及其Unicode常規類別的目錄。所有編目對所有代碼點都非常有效。對於枚舉所有分配的代碼點和構建數據結構等，這將非常有用。對於具有給定常規類別和字符類型的連續範圍內的每個代碼點，將調用回調函數。相鄰範圍可以具有不同的類型。 Unicode標準保證類型的數字值為0到31。

用法:

void IntlChar::enumCharTypes( $callback )

參數：該函數接受單個參數$callback。對於具有相同一般類別的每個相鄰代碼點範圍，將調用該函數。回調函數包含以下三個參數：

• 整數$start：這是起始代碼點。
• 整數$end：這是結束代碼點。
• 整數$name：類別類型(IntlChar::CHAR_CATEGORY_ *常量之一)

返回值：該函數不返回任何值。

以下示例程序旨在說明PHP中的IntlChar::enumCharTypes()函數：

程序：

<?php 
  
// PHP program to uses IntlChar::enumCharTypes() 
// function 
IntlChar::enumCharTypes(function($start, $end, $type) { 
    printf("U+%04x through U+%04x are in category %d\n", 
                                   $start, $end, $type); 
}); 
  
?>

輸出：

U+0000 through U+0020 are in category 15
U+0020 through U+0021 are in category 12
U+0021 through U+0024 are in category 23
U+0024 through U+0025 are in category 25
U+0025 through U+0028 are in category 23
U+0028 through U+0029 are in category 20
U+0029 through U+002a are in category 21
U+002a through U+002b are in category 23
U+002b through U+002c are in category 24
U+002c through U+002d are in category 23
U+002d through U+002e are in category 19
U+002e through U+0030 are in category 23
U+0030 through U+003a are in category 9
...

參考： https://www.php.net/manual/en/intlchar.enumchartypes.php