PHP中简短的if-else语句

Question

I have a variable called $day_price that can hold one of two values - either " weekday_price " or " weekend_price ". If I'm echoing $day_price however I would like the value of weekday_price to be echoed as Weekday Price and the value of weekend_price to be echoed as Weekend Price .

How can I achieve this without writing a long if-else statement like this?

if ($day_price=="weekday_price") { 
    echo "Weekday Price";
}
else if ($day_price=="weekend_price") { 
    echo "Weekend Price";
}

Answer 1

You can do this without conditions:

$res = ucwords(str_replace('_', ' ', $day_price));

For more information see ucwords and str_replace in PHP Manual

Answer 2

There isn't a direct way (this is a "problem" for all programming languages).

You can, for example, build an array with key value pairs where key is weekend_price and value is Weekend Price

$tmpArray = array(
    "weekend_price" => "Weekend Price",
    "weekday_price" => "Weekday Price"
);
echo $tmpArray[$day_price];

Otherwise if you are sure you'll use "_" instead of spaces, and you want uppercase all words, you can use this:

echo ucwords(str_replace("_", " ", $day_price));

Another solution (which I don't like but can be used):

function ConvertWeekPrices($day_price)
{
    $result = null;
    switch($day_price)
    {
        case "weekend_price":
            $result = "Weekend Price";
            break;
        case "weekday_price":
            $result = "Weekday Price";
            break;
    }
    // Do something with result if you want
    // Do some checks if result is null
    return $result;
}

Then in your code:

echo ConvertWeekPrices($day_price);

There are other approaches, you can use a database table, an xml file, there are unlimited combinations. I think those 2 are the easier approaches

Answer 3

A literal answer would be

$trans = array (
  "weekday_price" => "Weekday Price",
  "weekend_price" => "Weekend Price",
);
echo $trans[$day_price];

however, there is a way to avoid such a translation, I believe.

Answer 4

echo ucwords( str_replace( '_', ' ', $date_check ) );

在PHP手册中查看ucwords

Answer 5

If you want to use it in different places, you could define an associative array:

$texts = array('weekday_price' => 'Weekday Price',
               'weekend_price' => 'Weekend Price');

And use that like:

echo $texts[$day_price];

Answer 6

If it's only ever going to be weekend or weekday you could do:

echo ($day_price=="weekday_price") ? 'Weekday Price' : 'Weekend Price';

But i'd be careful when exchanging readability (therefore maintainability) for a few saved lines of code.