字符串替换为变量数组

Question

Ok if I use the code:

$phrase  = "You should eat fruits, vegetables, and fiber every day.";
$healthy = array("fruits", "vegetables", "fiber");
$yummy   = array("pizza", "beer", "ice cream");
$newphrase = str_replace($healthy, $yummy, $phrase);

// Provides: You should eat pizza, beer, and ice cream every day

However what if my list of words to replace are a variable.

$sample1 = "fruits, vegetables, fiber";
$sample2 = "pizza, beer, ice cream";
$phrase  = "You should eat fruits, vegetables, and fiber every day.";
$healthy = array($sample1);
$yummy   = array($sample2);
$newphrase = str_replace($healthy, $yummy, $phrase);

// Provides: You should eat fruits, vegetables, and fiber every day.

Same if I use:

$sample1 = '"fruits", "vegetables", "fiber"';
$sample1 = '"pizza", "beer", "ice cream"';
$phrase  = "You should eat fruits, vegetables, and fiber every day.";
$healthy = array($sample1);
$yummy   = array($sample2);
$newphrase = str_replace($healthy, $yummy, $phrase);

Am I missing something?

Is there a way to do this easily?

Answer 1

you need to turn the strings in to arrays, use explode in this case:

$sample1 = "fruits, vegetables, fiber";
$sample2 = "pizza, beer, ice cream";
$phrase  = "You should eat fruits, vegetables, and fiber every day.";
    $healthy = explode(',',$sample1);
    $yummy   = explode(',',$sample2);
$newphrase = str_replace($healthy, $yummy, $phrase);