Ecplise +

$total_sale= get_sale_total($year, $month, $day);

<code>$total_cardsale= get_cardsale_total($year, $month, $day);    
$total_served_cust = 0; //get_served_total($year, $month, $day);
$total_new_cust = get_new_customer_total($year, $month, $day);
$total_new_paidcust = get_new_paid_customer_total($year, $month, $day);</code>

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Reply content:

$total_sale= get_sale_total($year, $month, $day);

<code>$total_cardsale= get_cardsale_total($year, $month, $day);    
$total_served_cust = 0; //get_served_total($year, $month, $day);
$total_new_cust = get_new_customer_total($year, $month, $day);
$total_new_paidcust = get_new_paid_customer_total($year, $month, $day);</code>

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The best one for debugging is phpstrom
I feel it is easier to use than ecplise