如何在php中的2个标签之间提取文本

Question

我需要在一块文本中找到2个标签,并保留它们之间的任何文本.

例如,如果"Begin"标签是-----start-----,并且"End"标签是-----end-----

鉴于此文本:

rtyfbytgyuibg-----start-----isnv4b987b6vdc5y6ughnjmn9b8v76ctyubinn98b76r
-----end-----gcgkhjkn

我需要保留2个标签之间的文字: isnv4b987b6vdc5y6ughnjmn9b8v76ctyubinn98b76r

有任何想法吗？谢谢.

Answer 1

以下是几种方法:

$lump = 'rtyfbytgyuibg-----start-----isnv4b987b6vdc5y6ughnjmn9b8v76ctyubinn98b76r-----end-----gcgkhjkn';
$start_tag = '-----start-----';
$end_tag = '-----end-----';

// method 1
if (preg_match('/'.preg_quote($start_tag).'(.*?)'.preg_quote($end_tag).'/s', $lump, $matches)) {
    echo $matches[1];
}

// method 2 (faster)
$startpos = strpos($lump, $start_tag) + strlen($start_tag);
if ($startpos !== false) {
    $endpos = strpos($lump, $end_tag, $startpos);
    if ($endpos !== false) {
        echo substr($lump, $startpos, $endpos - $startpos);
    }
}

// method 3 (if you need to find multiple occurrences)
if (preg_match_all('/'.preg_quote($start_tag).'(.*?)'.preg_quote($end_tag).'/s', $lump, $matches)) {
    print_r($matches[1]);
}

Answer 2

试试这个:

$start = '-----start-----';
$end   = '-----end-----';
$string = 'rtyfbytgyuibg-----start-----isnv4b987b6vdc5y6ughnjmn9b8v76ctyubinn98b76r-----end-----gcgkhjkn';
$output = strstr( substr( $string, strpos( $string, $start) + strlen( $start)), $end, true);
echo $output;

这将打印:

isnv4b987b6vdc5y6ughnjmn9b8v76ctyubinn98b76r