使用数组作为函数参数php

Question

I have an array that I would like to pass to a function as a parameter. These array values will be used to pull values out of another array and display them.

My Function:

function showTreadmills($listbrands) {
    global $treadmills;
    foreach( $treadmills as $brand=>&$features ) {
        if ($brand == $listbrands) { 
            return '<p>'.$features["description"].'</p>';
        }
    }
}

Treadmills Array:

$treadmills = [
    'bowflexseries3' => [
        'description' => 'Bowflex Series 3',
        'image' => '/images/bowflex-series-3-150x150.jpg',
        'url' => '/treadmills/bowflex/series-3',

    ],
    'solef85' => [
        'description' => 'Sole F85',
        'image' => '/images/sole-f85-150x150.jpg',
        'url' => '/treadmills/sole/f-85',
    ],
    'endurancet10hrc' => [
        'description' => 'Endurance T10HRC',
        'image' => '/images/endurance-t10hrc-150x150.jpg',
        'url' => '/treadmills/endurance/t10hrc',
    ]
];

Values that I'm trying to pull out of array in my function:

 <?php echo showTreadmills('bowflexseries3','solef85'); ?>

This only returns the first Description from the array, which is Bowflex Series 3. I'm trying to figure out how to get it to pull the description for bowflexseries3 and solef85. I'm sure it's a dumb oversight. Thanks in advance!

Answer 1

You're not passing an array to the function, you're passing two strings. You need to call array() to wrap an array around them:

echo showTreadmills(array('bowflexseries3','solef85'));

Then you need to change showTreadmills. You can't use == to compare a string to an array. It looks like you want to test whether the string is in the array, so it should be:

if (in_array($brand, $listbrands))

Or instead of looping through $treadmills and testing whether it's equal to one of $listbands, you could loop through $listbrands:

$result = '';
foreach ($listbrands as $brand) {
    if (isset($treadmills[$brand])) {
        $result .= '<p>'.$treadmills[$brand]["description"].'</p>';
    }
}
return $result;

This is better, since it loops through the smaller array. And in_array() has to do a search, while accessing an associative array is just a hash lookup.

Notice that you need to concatenate the results into a string during the loop. If you use return in the loop, you'll only return the first brand found.