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@ 2017-07-24T13:39:09Z

<?php

class Atm
{
    private $balance;
    
    public function __construct($balance)
    {
        $this->balance = $balance;    
    }
    
    public function deposit($amount)
    {
        $this->balance = $this->balance + $amount;    
    }
    
    public function withdraw($amount)
    {
        if ($amount > $this->balance) {
            throw new InvalidArgumentException('You have insufficient funds to withdraw '.$amount.'.');
        }
        $this->balance = $this->balance - $amount;
    }
    
    public function getBalance()
    {
        return $this->balance;
    }
}

try {
    $atm = new Atm(100); //start with 100 bucks
    echo $atm->getBalance()."\n";
    $atm->deposit(50);
    echo $atm->getBalance()."\n";
    $atm->withdraw(80);
    echo $atm->getBalance()."\n";
    $atm->withdraw(100);
} catch (Exception $e) {
    echo $e->getMessage()."\n";
}

Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: 100 150 70 You have insufficient funds to withdraw 100.
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 100 150 70 You have insufficient funds to withdraw 100.

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