The resulting line will consist of the discovered string

Question

The resulting line will consist of the discovered string

Let's say there's an interesting HTML document presented below with associated line numbers:

30 - <div id="myDiv">
31 -   <span class="mySpan">Some Text</span>

In this scenario, PHP is being utilized for a specific purpose:

$html = file_get_contents('myHtml.html')

The objective at hand involves locating the line number in which a particular string is found (assuming there is only one instance of the string within the document) and returning the complete content situated on that same line. Here are a couple of examples showcasing this functionality:

getLine('myDiv'); //returns <div id="myDiv">
getLine('class="mySpan"'); //returns <span class="mySpan">Some Text</span>

I would appreciate any guidance on how I can achieve this. Many thanks!

php html line-numbers

Answer 1

Answer №1

When it comes to understanding the concept of "line," which refers to a group of characters separated by a newline character ('\n'), you have the option to explode the $html string in the following manner:

$lines = explode("\n", $html);

Afterwards, you can proceed to iterate through each line while maintaining a line count:

$lineno = 1;
foreach ($lines as $line) {
    if (strstr($line, $what_to_find) !== FALSE) {
        //A match has been found
        echo "Line $lineno: $line\n";
    }
    $lineno++;
}

Answer 2

When it comes to understanding the concept of "line," which refers to a group of characters separated by a newline character ('\n'), you have the option to explode the $html string in the following manner:

$lines = explode("\n", $html);

Afterwards, you can proceed to iterate through each line while maintaining a line count:

$lineno = 1;
foreach ($lines as $line) {
    if (strstr($line, $what_to_find) !== FALSE) {
        //A match has been found
        echo "Line $lineno: $line\n";
    }
    $lineno++;
}

The resulting line will consist of the discovered string

Answer №1

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