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This document uses PHP Chinese website manual Release
(PHP 4 >= 4.0.4, PHP 5, PHP 7)
ctype_graph — 做可打印字符串检测,空格除外
$text
)
检查提供的 string 和 text
里面的字符输出都是可见的。
text
需要被测试的字符串。
如果 text
里面的每个字符都是输出可见的(没有空白),就返回 TRUE
;反之就返回 FALSE
。
Example #1 一个 ctype_graph() 例子
<?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" ;
}
}
?>
以上例程会输出:
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.
Note:
如果给出一个 -128 到 255 之间(含)的整数, 将会被解释为该值对应的ASCII字符 (负值将加上 256 以支持扩展ASCII字符). 其它整数将会被解释为该值对应的十进制字符串.