PHP 检查文件是否包含字符串
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原文地址: http://stackoverflow.com/questions/9059026/
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PHP check if file contains a string
提问by WildBill
I'm trying to see if a file contains a string that is sent to the page. I'm not sure what is wrong with this code:
我正在尝试查看文件是否包含发送到页面的字符串。我不确定这段代码有什么问题：
?php
$valid = FALSE;
$id = $_GET['id'];
$file = './uuids.txt';
$handle = fopen($file, "r");
if ($handle) {
// Read file line-by-line
while (($buffer = fgets($handle)) !== false) {
if (strpos($buffer, $id) === false)
$valid = TRUE;
}
}
fclose($handle);
if($valid) {
do stufff
}
回答by Niet the Dark Absol
Much simpler:
更简单：
<?php
if( strpos(file_get_contents("./uuids.txt"),$_GET['id']) !== false) {
// do stuff
}
?>
In response to comments on memory usage:
回应关于内存使用的评论：
<?php
if( exec('grep '.escapeshellarg($_GET['id']).' ./uuids.txt')) {
// do stuff
}
?>
回答by xdazz
The is code is more efficient while searching larger files.
is 代码在搜索更大的文件时效率更高。
$handle = fopen('path_to_your_file', 'r');
$valid = false; // init as false
while (($buffer = fgets($handle)) !== false) {
if (strpos($buffer, $id) !== false) {
$valid = TRUE;
break; // Once you find the string, you should break out the loop.
}
}
fclose($handle);
回答by Faisal Shaikh
function getDirContents($dir, &$results = array())
{
if ($_POST['search'] == null)
exit;
ini_set('max_execution_time', $_POST['maxtime']);
$_SESSION['searchString'] = $_POST['search'];
echo "<script>var elm = document.getElementById('search');elm.value='$_POST[search]';</script>";
if (!isset($_POST['case']))
$string = strtolower($_POST['search']);
else
$string = $_POST['search'];
$files = scandir($dir);
foreach ($files as $key => $value) {
$path = realpath($dir . DIRECTORY_SEPARATOR . $value);
if (!is_dir($path)) {
$content = file_get_contents($path);
if (!isset($_POST['case']))
$content = strtolower(file_get_contents($path));
if (strpos($content, $string) !== false) {
echo $path . "<br>";
}
$results[] = $path;
} else if ($value != "." && $value != "..") {
getDirContents($path, $results);
$results[] = $path;
}
}
return $results;
}
Original project: https://github.com/skfaisal93/AnyWhereInFiles
回答by Manjula
This is working, I have tested end to end.
这是有效的，我已经进行了端到端的测试。
<?php
// incoming record id
// checking in uuids.txt file
if (exec('cat ./uuids.txt | grep '.escapeshellarg($_GET['id']))) {
// do stuff
echo 'found...';
}
?>
回答by Sandeep Yadav
<?php
function getDirContents($dir, &$results = array()){
$files = scandir($dir);
foreach($files as $key => $value){
$path = realpath($dir.DIRECTORY_SEPARATOR.$value);
if(!is_dir($path)) {
$results[] = $path;
} else if($value != "." && $value != "..") {
getDirContents($path, $results);
$results[] = $path;
}
}
return $results;
}
$res = getDirContents('path');
$searchfor = 'search string';
foreach ($res as $file) {
if(is_dir($file)) {}else{
$contents = file_get_contents($file);
$pattern = preg_quote($searchfor, '/');
$pattern = "/^.*$pattern.*$/m";
if(preg_match_all($pattern, $contents, $matches)){ ?>
<tr>
<td> <?php $string = implode("\n", $matches[0]); echo str_replace($searchfor,'<strong style="background-color:#ffff00">'.$searchfor.'</strong>',$string); ?> </td>
<td> <?php echo $file; ?> </td>
</tr>
<?php }else{
//echo "No matches found";
}
}
}
?>
