将字符串值作为参数传递给javascript [复制]

I`m trying to pass a string value to a JavaScript parameter. this is my html code

<input type="submit"  value="Edit" onclick="edit(<?php echo $key; ?> );" name="<?php echo $key; ?>" >

this is my JavaScript function

<script type="text/javascript">
function edit(id){
window.location.href="http://localhost/koko/edit-post.php?id="+id;
}
</script>

But this didn't work for me. How I solve this problem?

</div>

As the type of $key is string you need to surround it in quotes. Use quotes to the parameter.

onclick="edit('<?php echo $key; ?>');"
//            ^                   ^

Better way:

As the name what you want in the function, you can get it by using the element.name.

See the comments highlighted in the code below:

HTML:

<input type="submit" value="Edit" onclick="edit(this);" name="<?php echo $key; ?>">
<!--                                            ^^^^ Pass the element instance to the function -->

Javascript:

<script type="text/javascript">
function edit(el) {
    //        ^^ // Get the element instance here
    window.location.href = "http://localhost/koko/edit-post.php?id=" + el.name; // Use element.name to get the `$key` value.
    //                                                                 ^^^^^^^
}
</script>