Question

我是php新手，想要一个可以识别外部文件中某些标签之间文本的脚本。

我设法找到答案here，它识别设置字符串中标签中的文本，但我不确定如何让文件识别外部文本文件中的标签。

PHP：

<?php
function innerh($string, $start, $end){
    $string = " ".$string;
    $ini = strpos($string,$start);
    if ($ini == 0) return "";
    $ini += strlen($start);
    $len = strpos($string,$end,$ini) - $ini;
    return substr($string,$ini,$len);
}

$fullstring = "The <tag>Output</tag>"; // this is the string
$parsed = innerh($fullstring, "<tag>", "</tag>");

echo $parsed;
?>

外部文件：

<tag>This text</tag> <!-- This is the target -->

Answer 1

与您已经在做的相似。目前，您正在使用该标记创建一个字符串，当您想要从文件中读取它时，您只需执行

$fullstring = file_get_contents('your-file.html');

无需其他更改。您可能需要提供该文件的完整路径，但这是关于它的。

该函数读取文件并以字符串形式返回其内容，您可以将其保存在变量中，就像手动构建变量一样。

Answer 2

您的代码必须是这样的：

<?php

function innerh($string, $start, $end){
    $string = " ".$string;
    $ini = strpos($string,$start);
    if ($ini == 0) return "";
    $ini += strlen($start);
    $len = strpos($string,$end,$ini) - $ini;
    return substr($string,$ini,$len);
}

// Open a file with READ-ONLY flag ("r") and start of begining for read.
// See: http://php.net/manual/en/function.fopen.php
$fp = fopen("/path/to/file", "r");

// Check that file is opened and ready for read
if ($fp) {
    // Until we have content on file, we resume reading
    while (!feof($fp)) {
        // Read from file, line by line.
        // See: http://php.net/manual/en/function.fgets.php
        $line = fgets($fp);

        // Process line by line and print result
        $parsed = innerh($line, "<tag>", "</tag>");
        echo $parsed;

        /* If your input file is a file without a new line or something like it,
           just add a `$line = '';` before while line and change read line with
           `$line  .= fgets($fp);`, also remove process line and print line. After
           that your file is on $line variable ;). */
    }
}
?>

识别外部文件-PHP中某些标记之间的字符串

2 个答案: