PHP Exercises : Display source code of a webpage

Last update on April 19 2025 11:50:51 (UTC/GMT +8 hours)

14. Display Webpage Source Code

Write a PHP script to display source code of a webpage (e.g. "http://www.example.com/").

Webpage: A web page is a document that is suitable for the World Wide Web and web browsers. A web browser displays a web page on a monitor or mobile device.

The web page usually means what is visible, but the term may also refer to a computer file, usually written in HTML or a comparable markup language. Web browsers coordinate various web resource elements for the written web page, such as style sheets, scripts, and images, to present the web page.

Sample Solution:

PHP Code:

<?php
// Read all lines from the specified URL and store them in an array
$all_lines = file('https://www.w3resource.com/');

// Iterate through each line in the array
foreach ($all_lines as $line_num => $line)
{
    // Display the line number and the HTML-escaped content of the line
    echo "Line No.-{$line_num}: " . htmlspecialchars($line) . "\n";
}
?>

Explanation:

• Read URL Content:
• The file() function reads all lines from the URL https://www.w3resource.com/ and stores them in the $all_lines array.
• Each element in $all_lines represents one line from the file or webpage.
• Loop Through Lines:
• A foreach loop iterates over each line in $all_lines.
• Each iteration provides the line number ($line_num) and the content of the line ($line).
• Display Line Number and Content:
• Inside the loop, echo outputs the line number (e.g., "Line No.-0") and the line content.
• The htmlspecialchars() function is used to escape any HTML in the line, ensuring it displays as plain text rather than as HTML code.
• Output Example:
• This code will display each line of the content from the URL along with its line number, in a numbered, plain-text format.

Output:

View the output in the browser

Flowchart:

For more Practice: Solve these Related Problems:

• Write a PHP script to fetch and display the source code of a remote webpage with basic syntax highlighting.
• Write a PHP script to retrieve the HTML source code of a URL and filter out specific HTML tags.
• Write a PHP script to output the webpage source code and count the total number of HTML elements.
• Write a PHP script to fetch a remote URL’s source code and highlight all HTML comment blocks.

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