Exception message: Deprecated Functionality: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in magento 2.4.6

Question

I updated my php version is 8.3 and magento version is 2.4.6 currently facing issue with round functionality.

Exception message: Deprecated Functionality: round(): Passing null to parameter #1 ($num) of type int|float is deprecated

Fee.php

$amount = $invoice->getHandlingCharges();
        $amount += round($invoice->getHandlingChargesTax(), 3, PHP_ROUND_HALF_UP);

        $baseAmount = $invoice->getBaseHandlingCharges();
        $baseAmount += round($invoice->getBaseHandlingChargesTax(), 3, PHP_ROUND_HALF_UP);

        $invoice->setGrandTotal($invoice->getGrandTotal() + $amount);
        $invoice->setBaseGrandTotal($invoice->getBaseGrandTotal() + $baseAmount);

        return $this;

please help

Haijerome · Accepted Answer · 2024-04-19 18:06:14Z

The exception was thrown because of null value passed to php round function.

These lines

   $amount += round($invoice->getHandlingChargesTax(), 3, PHP_ROUND_HALF_UP);
   $baseAmount += round($invoice->getBaseHandlingChargesTax(), 3, PHP_ROUND_HALF_UP)

should be replaced with

$amount += ($invoice->getHandlingChargesTax()) ? round($invoice->getHandlingChargesTax(), 3, PHP_ROUND_HALF_UP) : 0;

$baseAmount += ($invoice->getBaseHandlingChargesTax()) ? round($invoice->getBaseHandlingChargesTax(), 3, PHP_ROUND_HALF_UP) : 0;

Starship · Accepted Answer · 2025-05-23 04:37:51Z

0

To change your round function to handle null parameters like this, add ??""

round($invoice->getHandlingChargesTax()??"", 3, PHP_ROUND_HALF_UP);

Wherever you get a null exception, do this.

edited May 23 at 4:37

Starship

2594 silver badges11 bronze badges

answered Apr 21, 2024 at 18:07

Afzel Arshad

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Exception message: Deprecated Functionality: round(): Passing null to parameter #1 ($num) of type int|float is deprecated in magento 2.4.6

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