ctype_graph
(PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)
ctype_graph — 检测除空格外的任何打印字符
参数
返回值
如果 text 中每个字符都是输出可见的（没有空白），那么就返回
true，否则返回 false。当使用空字符串调用时，结果始终为 false。
示例
示例 #1 ctype_graph() 示例
<?php
$strings = array('string1' => "asdf\n\r\t", 'string2' => 'arf12', 'string3' => 'LKA#@%.54');
foreach ($strings as $name => $testcase) {
if (ctype_graph($testcase)) {
echo "The string '$name' consists of all (visibly) printable characters.\n";
} else {
echo "The string '$name' does not consist of all (visibly) printable characters.\n";
}
}
?>以上示例会输出：
The string 'string1' does not consist of all (visibly) printable characters. The string 'string2' consists of all (visibly) printable characters. The string 'string3' consists of all (visibly) printable characters.
参见
- ctype_alnum() - 检测字母数字式字符
- ctype_print() - 检测可打印字符
- ctype_punct() - 检测可打印的字符是不是不包含空白、数字和字母
- IntlChar::isgraph() - Check if code point is a graphic character
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