Function does not remove array elements

Question

Within the PHP i add two arrays and then I add them into a variable of a print with JS.

<?php
$objp = array();    
$objs = array();

print("<SCRIPT language=javascript> 
         objp = \"$objp\";
         objs = \"$objs\";
         n_p = new Array (10);
         </SCRIPT>");   
?>

Now inside the JavaScript I use a for when I submit to add the contents of these two arrays within the n_p;

<script language="javascript">

    for(var i = 0; i < 10; i++){
        if(objp!=''){
            n_p[i] = objp;
            objp.shift();
        }
        else{
            n_p[i] = objs;
            objs.shift();
        }   
    }
</script>

The problem is, I’m using the shift() to remove the first element of array, but when he goes inside the if it does not perform. What could be the problem? The function objs.shift(); is not executed!

Obs* I used the splice() but ended up not working either!

Answer 1

Your variables objp and objs in Javascript are not arrays, are strings. PHP will simply issue "Array()" for them. Your PHP would need to be like this:

print("<SCRIPT language=javascript> 
     objp = " . json_encode($objp) . ";
     objs = " . json_encode($objs) . ";
     n_p = new Array (10);
     </SCRIPT>");

Assuming I understand what you want with the Javascript loop, it should look like this:

for(var i = 0; i < 10; i++){
    if(objp[i] != ''){
        n_p[i] = objp[i];
        objp.splice(i, 1);
    }
    else{
        n_p[i] = objs[i];
        objs.splice(i, 1);;
    }   
}