I'm passing array via GET to PHP and then sending to the client side (JavaScript). When I get it it looks like this:
m_prod = [5,,,,,,,,6,,,,,,];
In other words, it is including a space in the positions that do not contain a value! How can I remove these spaces in JavaScript?
<?php
$m_prod = trim($_GET['m_prod']);
print("<SCRIPT language=javascript> m_prod = \"$m_prod\"; </SCRIPT>");
?>
You can use the filter function as follows:
var m_prod = [5, , , , , , , , , ,6 , , , ];
var resultado = m_prod.filter(function(ele){
return ele !== undefined;
});
console.log(resultado); // [5,6]
If the problem comes from PHP I think it should solve in PHP.
To filter an array of empty elements:
$m_prod = array_filter($m_prod);
In case there are numbers inside the array then we have to be extra careful because the 0 is set to false and is removed from the array. So you can do:
$m_prod = array_filter($m_prod, function($value) {
return !empty($value) || $value === 0;
});
To pass this to JavaScript you can render like this:
echo '<script>';
echo 'm_prod = '.json_encode($m_prod);
echo '</script>';