Inject JavaScript using PHP - Stack Overflow

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I would like to load external webpage using PHP and to inject some JavaScript to it before displaying it.

To be honest, I have no idea at all how to do it (if it is possible). Somebody?

Example:

$html = file_get_contents($url);
// inject javascript here
echo $html;

I would like to load external webpage using PHP and to inject some JavaScript to it before displaying it.

To be honest, I have no idea at all how to do it (if it is possible). Somebody?

Example:

$html = file_get_contents($url);
// inject javascript here
echo $html;

• javascript
• php

Share Improve this question Follow asked Oct 18, 2015 at 16:43 MenteMente 4111 silver badge22 bronze badges 1

• I would like to inject some JavaScript before displaying it? So like a XSS attack? – Nick Bailey Commented Oct 18, 2015 at 16:47

Add a ment  | 

2 Answers 2

Sorted by: Reset to default 3

you need to simply construct the string of your js code if it is for that page only and add it inside a script tag and echo the entire string. like this:

echo "<script>alert('hi');</script>"; //as page script example

Or if it is a file include then include it properly with script tag and echo it and it will be available on your page. like this:

echo "<script src='path to file'></script>"; 

In that case your code structure will bee like this

    $html = file_get_contents($url);
    echo "<script src='path to file'></script>"; 
   // echo "<script>alert('hi');</script>"; //as page script example
    echo $html;

simply echo it

$html = file_get_contents($url);
echo "your  javascript here"; 
echo $html;

I would like to load external webpage using PHP and to inject some JavaScript to it before displaying it.

To be honest, I have no idea at all how to do it (if it is possible). Somebody?

Example:

$html = file_get_contents($url);
// inject javascript here
echo $html;

I would like to load external webpage using PHP and to inject some JavaScript to it before displaying it.

To be honest, I have no idea at all how to do it (if it is possible). Somebody?

Example:

$html = file_get_contents($url);
// inject javascript here
echo $html;

• javascript
• php

Share Improve this question Follow asked Oct 18, 2015 at 16:43 MenteMente 4111 silver badge22 bronze badges 1

• I would like to inject some JavaScript before displaying it? So like a XSS attack? – Nick Bailey Commented Oct 18, 2015 at 16:47

Add a ment  | 

2 Answers 2

Sorted by: Reset to default 3

you need to simply construct the string of your js code if it is for that page only and add it inside a script tag and echo the entire string. like this:

echo "<script>alert('hi');</script>"; //as page script example

Or if it is a file include then include it properly with script tag and echo it and it will be available on your page. like this:

echo "<script src='path to file'></script>"; 

In that case your code structure will bee like this

    $html = file_get_contents($url);
    echo "<script src='path to file'></script>"; 
   // echo "<script>alert('hi');</script>"; //as page script example
    echo $html;

simply echo it

$html = file_get_contents($url);
echo "your  javascript here"; 
echo $html;

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