I have created an HTML
form in the admin pages of a Wordpress
installation. When I press the submit button I want the inserted data to be validated using a JavaScript
function so that alert
s are displayed when the data is not correctly inserted. I have tried all the things I have come across, but I have not been able to make it work. It should be something small, but I am not able to see it at this point.
The only thing I do is to echo
out an HTML
form to be shown using PHP
and include some JavaScript
function to be run. What is wrong in the code below? The {$this->form}
part is just a string variable containing the HTML
form. This works as expected.
public function __toString()
{
return "
<script>
function validateForm()
{
alert(\"FOOOOO\");
return false;
}
</script>
<h1>Heading</h1><br>
<form method=\"post\" onsubmit=\"return validateForm()\">
{$this->form}<br>
<input type=\"submit\" name=\"submit\" value=\"Submit me!\" /><br>
</form>
";
}
In this case, the error turned out to be naming the JavaScript function validateForm()
, as this is an internal function in the Wordpress core. Changing it to validate_form()
or whatever fixes the issue.
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