PHP在txt文件中搜索并回显整行

Question

我正在尝试使用php创建一个脚本，该脚本将在文本文件中搜索并获取整行并回显它。

我有一个名为“ numorder.txt”的文本文件（.txt），并且在该文本文件中有几行数据，每5分钟会有新行出现（使用cron作业）。数据类似于：

2 aullah1

7 name

12 username

我将如何创建一个php脚本来搜索数据“ aullah1”，然后抓起整行并回显它？（一旦回显，它应该显示“ 2 aullah1”（不带引号）。

如果我没有清楚地解释任何事情和/或您想让我更详细地解释，请发表评论。

Answer 1

还有一个PHP示例，将显示多行匹配：<?php$file = 'somefile.txt';$searchfor = 'name';// the following line prevents the browser from parsing this as HTML.header('Content-Type: text/plain');// get the file contents, assuming the file to be readable (and exist)$contents = file_get_contents($file);// escape special characters in the query$pattern = preg_quote($searchfor, '/');// finalise the regular expression, matching the whole line$pattern = "/^.*$pattern.*\$/m";// search, and store all matching occurences in $matchesif(preg_match_all($pattern, $contents, $matches)){&nbsp; &nbsp;echo "Found matches:\n";&nbsp; &nbsp;echo implode("\n", $matches[0]);}else{&nbsp; &nbsp;echo "No matches found";}

Answer 2

像这样做。这种方法可以让你搜索一个任意大小的文件（大尺寸不会崩溃的脚本），并返回匹配的所有行你想要的字符串。<?php$searchthis = "mystring";$matches = array();$handle = @fopen("path/to/inputfile.txt", "r");if ($handle){&nbsp; &nbsp; while (!feof($handle))&nbsp; &nbsp; {&nbsp; &nbsp; &nbsp; &nbsp; $buffer = fgets($handle);&nbsp; &nbsp; &nbsp; &nbsp; if(strpos($buffer, $searchthis) !== FALSE)&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; $matches[] = $buffer;&nbsp; &nbsp; }&nbsp; &nbsp; fclose($handle);}//show results:print_r($matches);?>注意，该方法strpos与!==运算符一起使用。

Answer 3

使用file()和strpos()：<?php// What to look for$search = 'foo';// Read from file$lines = file('file.txt');foreach($lines as $line){&nbsp; // Check if the line contains the string we're looking for, and print if it does&nbsp; if(strpos($line, $search) !== false)&nbsp; &nbsp; echo $line;}在此文件上进行测试时：foozah&nbsp;barzah&nbsp;abczah它输出：富扎更新：如果未找到文本，则显示文本，请使用类似以下内容的方法：<?php$search = 'foo';$lines = file('file.txt');// Store true when the text is found$found = false;foreach($lines as $line){&nbsp; if(strpos($line, $search) !== false)&nbsp; {&nbsp; &nbsp; $found = true;&nbsp; &nbsp; echo $line;&nbsp; }}// If the text was not found, show a messageif(!$found){&nbsp; echo 'No match found';}在这里，我使用$found变量来查找是否找到匹配项。