while algorithm loop in php

I am trying loop over a set of numbers if I inputted them into the terminal. By calling ‘php scripts/max.php 1 5 9’ I want a loop that loops over 1, 5, 9 and tells me what the largest number is. I have been throughingly confused with loops but I got this far.

$args = $argv; 
array_shift($args); 

if (empty($args)) {
    echo "Expecting numbers as arguments." . PHP_EOL;
    exit(1);
}

$largest = [];

while ( $args++) {
    echo $args . PHP_EOL;
    while($args > $largest) {
        break 2;
    }
}

The idea is the loop would take any amount of numbers when inputting them in the terminal and tell me which number is the largest.

>Solution :

Throw away all your loops and just do max($args)1

Your code consists of way too much errors:

1. $args is array, so $args++ and $args > $largest makes no sense and it’s acting on hidden type cast of array
2. $largest = []; should be integer, not array.
3. You never assign anything to be $largest

If that’s school assignment, then do it proper way:

$args = $argv; 
array_shift($args); 

if (empty($args)) {
    echo "Expecting numbers as arguments." . PHP_EOL;
    exit(1);
}

$largest = PHP_INT_MIN; // first set it to be smallest possible integer. And since $args is not empty, we will overwrite it

foreach ($args as $arg) {
    // Compare if current element is larger than our current $largest
    if ($arg > $largest) {
        $largest = $arg;
    }
}

echo "Largest number: {$largest}";