Question

I made a form where you can add more fields by clicking on a button. Everytime you click on a button it makes a new field with a higher number behind it. I do this with jquery and I need to get the highest number with php.
So if I have auto_part1 and auto_part2 I need to get 2 with PHP.

This is my html:

<div id="parts">
    Part
    <input type="text" id="auto_part" name="auto_part" />
                <br />
    Description
    <input type="text" id="auto_description" name="auto_description" />
                <br />
</div>
    <a href="#" id="addField">Add another part</a>

The jQuery function:

$(function() {
var scntDiv = $('#parts');
var i = $('#parts input').size() + -1;

$('#addField').on('click', function() {
    $('<br /><span>Part</span> <input type="text" id="auto_part'+i+'" name="auto_part'+i+'" /><br />').appendTo(scntDiv);
    $('<span>Description</span> <input type="text" id="auto_description'+i+'" name="auto_description'+i+'" /> <br />').appendTo(scntDiv);
    i++;
    return false;
});

$('#remScnt').on('click', function() { 
    if( i > 2 ) {
            $(this).parents('p').remove();
            i--;
    }
    return false;
});
});

Answer 1

Create a hidden input field:

<input type="hidden" id="row_count" name="row_count" value="">

And onsubmit do:

$('#row_count').val(i);