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Editorial Team
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Asked: 2026-05-26T09:45:00+00:00

Im new to php, I dont have good idea how to make things between

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Im new to php, I dont have good idea how to make things between php and javascript please correct me If im wrong

<!doctype html>
<html>
<head>
<Script type="text/javascript">
function show(m)
{
 var k = document.getElementById(m);
 k.src="four.jpg";
}
</head>
<body>
<? --some php code--
  $i       = 2;
  $row[$i] = "somefilename";
  printf('<img src="%s" id="%d"  onclick="show($i)"/>', $row[$i],$i);
?>

This is my sample.php file.I wanted to raise a onclick event for the image tag through javascript,The img tag is created using php script and I want it to be like these 

onclick="show($i)" should be made like below
onclick="show('2')" <!-- and here 2 is the value of php variable

I had tried these way 

 onclick="show('$i')" but it passes $i as the parameter to javascript show() function 
 but not the value 2

Please help me with these. actually is it possible ? As i know javascript is a browser scripting and php is server side scripting and can we pass variables from php to javascript these way ?

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1 Answer

  1. Editorial Team

    Funny, everybody who’s answered so far has changed the printf parameter to either use double quotes or concatenate the variable. Why not:

    printf('<img src="%s" id="%d"  onclick="show(%d)"/>', $row[$i],$i,$i);

    as he is already using printf()…?

    Furthermore, you don’t actually need the value from PHP as it is already in the HTML. You can just use: 

    printf('<img src="%s" id="%d"  onclick="show(this.id)"/>', $row[$i],$i);
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