CODEWITHSUNDEEP
phplinefile-get-contents
user3865749
user3865749

Reputation: 9

How can I read the nth line of a web page's HTML, using PHP?

I've seen this question for files, but for some reason they won't ever work with a web page.

I'm trying to use file_get_contents to get the contents of a web page (don't care much about speed, hence I'm not using cURL), and then I want to print a specific line.

Can you please give me the simplest possible way of doing this, as I'm creating an API which fetches specific lines from multiple web pages.

Alternatively, is there a way I can search for and print a line that contains a certain string? For example, a line that starts with "Foo" (if there's only one line containing that).

Upvotes: 0

Views: 2479

Answers (3)

Carim Gemelli
Carim Gemelli

Reputation: 1

$url = 'https://www..';

$content = file_get_contents($url);

if($content){

    $start = strpos($content, '<span>');// $start is the first word where you want to begin read code

    $end = strpos($content,'</span>',$start );// $end is the last word where you want to stop read code

    $result = substr($content,$start,$end - $start);// $result is the code you have read and you want to display
   
} else {
    $error = 'no data found';
}

Upvotes: 0

Robert
Robert

Reputation: 10390

How can I read a specific line of a WEB PAGE? [PHP]

Can you please give me the simplest possible way of doing this, as I'm creating an api which fetches specific lines from multiple web pages.

Alternatively, is there a way I can search for and print a line that contains a certain string?

Sample html file:

file.html

<html>
<head><title>File</title></head>
<body>
    <p>Nancy is my name</p>
    <p>James is my name</p>
    <p>Foo is my name</p>
    <p>Bob is my name</p>
</body>
</html>

simple php function:

function checkFile( $file, $keyword ) {

    // open file for reading
    $handle = @fopen( $file, 'r' );

    // check to make sure handle is valid
    if( $handle ) {

        // traverse file line by line
        while( ($line = fgets($handle)) !== false ) {

            // search for specific keyword no matter what case is used i.e. foo or Foo
            if( stripos($line, $keyword) === false ) {
                // string not found, continue with next iteration
                continue;
            } else {

                // keyword was found

                // close file
                fclose($handle);

                // return line
                return $line;
            }
        }
    }
}

$result = checkFile( 'file.html', 'foo' );

echo $result;

Outputs: <p>Foo is my name</p>

Upvotes: 1

Kamil Karkus
Kamil Karkus

Reputation: 1283

function readStrLine($str, $n) {
    $lines = explode(PHP_EOL, $str);
    return $lines[$n-1];
}

$file = file_get_contents('http://google.pl');

echo readStrLine($file, 10);

you can explode string by new line, then you got array of lines which start with index 0 (it's first line)

EDIT alternative way with tidy html

function readHtmlLine($html, $n) {
    $dom = new DOMDocument();
    $dom->preserveWhiteSpace = false;
    $dom->loadHTML($html);
    $dom->formatOutput = true;
    $lines = explode(PHP_EOL, $dom->saveHTML());
    return $lines[$n-1];
}

$file = file_get_contents('http://google.pl');

echo readHtmlLine($file, 10);

Upvotes: 4

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