Search String and Return Line PHP

I'm trying to search a PHP file for a string and when that string is found I want to return the whole LINE that the string is on. Here is my example code. I'm thinking I would have to use explode but cannot figure that out.

$searchterm =  $_GET['q'];

$homepage = file_get_contents('forms.php');

 if(strpos($homepage, "$searchterm") !== false)
 {
 echo "FOUND";

 //OUTPUT THE LINE

 }else{

 echo "NOTFOUND";
 }

Just read the whole file as array of lines using file function.

function getLineWithString($fileName, $str) {
    $lines = file($fileName);
    foreach ($lines as $lineNumber => $line) {
        if (strpos($line, $str) !== false) {
            return $line;
        }
    }
    return -1;
}

Nugget

You can use fgets() function to get the line number.

Something like :

$handle = fopen("forms.php", "r");
$found = false;
if ($handle) 
{
    $countline = 0;
    while (($buffer = fgets($handle, 4096)) !== false)
    {
        if (strpos($buffer, "$searchterm") !== false)
        {
            echo "Found on line " . $countline + 1 . "\n";
            $found = true;
        }
        $countline++;
    }
    if (!$found)
        echo "$searchterm not found\n";
    fclose($handle);
}

If you still want to use file_get_contents(), then do something like :

$homepage = file_get_contents("forms.php");
$exploded_page = explode("\n", $homepage);
$found = false;

for ($i = 0; $i < sizeof($exploded_page); ++$i)
{
    if (strpos($buffer, "$searchterm") !== false)
    {
        echo "Found on line " . $countline + 1 . "\n";
        $found = true;
    }
}
if (!$found)
    echo "$searchterm not found\n";

If you use file rather than file_get_contents you can loop through an array line by line searching for the text and then return that element of the array.

PHP file documentation

You want to use the fgets function to pull an individual line out and then search for the

<?PHP   
$searchterm =  $_GET['q'];
$file_pointer = fopen('forms.php');
while ( ($homepage = fgets($file_pointer)) !== false)
{
    if(strpos($homepage, $searchterm) !== false)
    {
        echo "FOUND";
        //OUTPUT THE LINE
    }else{
    echo "NOTFOUND";
    }
}
fclose($file_pointer)

Thomas Bates

Here is an answered question about using regular expressions for your task.

Get line number from preg_match_all()

Searching a file and returning the specified line numbers.

来源：https://stackoverflow.com/questions/9721952/search-string-and-return-line-php

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