Question

I have this line that appending this in jquery:

$('#league2').append("<input type=\"button\" id=\"2btn\" value=\"1.2\" class=\"butta\"  onmousedown=\"active('exam\'ple','awayteam')");

Notice the “exam\’ple”… i escaped the ‘ with \’
so when clicking the button, the function active should work.

this is the function active:

function active(hometeam,awayteam){
alert("if this is alerted, it works!");
}

when i click the button it should alert “if this is alerted, it works!”, but it’s not alerting it. and it think because when i use the function, this is the outpot:

function active(exam\'ple,awayteam){

when i appending the same thing with a word that does not contain ” ‘ “, it is working.

Answer 1

You need to escape the backslash in your parameters for the active function, instead of the apostrophe.

$('#league2').append("<input type=\"button\" id=\"2btn\" value=\"1.2\" class=\"butta\"  onmousedown=\"active('exam\\'ple','awayteam')");

To escape a string to append it to that code with php, you can use regular expressions. The following will work in your case.

// Replaces a backslash with four backslashes: The 'append' function will interpret it as two backslashes; the 'active' function, as only one.
$str = preg_replace("/\\\\/", "\\\\\\\\\\\\\\\\", $str);
// Replaces an apostrophe with two backslashes and an apostrophe, then javascript will append only one backslash and an apostrophe, escaping that way an apostrophe.
$str = preg_replace("/'/", "\\\\\\\\'", $str);
// Replaces quotations with a backslash and quotations: the quotations will be escaped inside the append function, so one quotations will be printed out on your HTML
$str = preg_replace("/\"/", "\\\\\"", $str);

If you don’t know what a regular expression (regex) is, I suggest you researching a bit about how to use them. They will help you a lot.

EDIT: By some reason, the last program needed double of backslashes to work. Updated.