Question

我有以下输入字符串，其中包含多行：

BYTE    $66,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$13,$14,$01,$19,$20,$01,$20,$17,$08,$09,$0C,$05,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$66 // comment
BYTE    $66,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$66

我使用以下preg_match语句来匹配数据部分（所以只有十六进制值）而不是前面的空格和文本，也不是尾随的空格和注释部分：

preg_match('/(\$.*?) /s', $sFileContents, $aResult);

输出是这样的：

output: Array
(
    [0] => $66,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$13,$14,$01,$19,$20,$01,$20,$17,$08,$09,$0C,$05,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$66 
    [1] => $66,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$13,$14,$01,$19,$20,$01,$20,$17,$08,$09,$0C,$05,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$66
)

正如您可能看到的那样，匹配似乎是正确的，但第一个输入行重复了两次。＆＃39;＆＃39;修饰符应该帮助我超越行尾，但我似乎无法超越第一行。

有没有人知道如何继续？

Answer 1

您可以轻松匹配所有行的数据：

preg_match_all('/\$[\dA-Fa-f,\$]+/', $sFileContents, $aResult);
echo "<pre>".print_r($aResult,true);

输出：

$aResultArray:
(
    [0] => Array
        (
            [0] => $66,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$13,$14,$01,$19,$20,$01,$20,$17,$08,$09,$0C,$05,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$66
            [1] => $66,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$20,$66
        )

)

Answer 2

您不需要selection（DOTALL）标志。您可以使用：

RegEx Demo

php preg_match s和m修饰符不适用于多行

2 个答案: