duanduan1993 2013-03-08 18:35
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在php中回显函数是不好的做法吗？

Is it bad practice to echo out a bunch of HTML using a function in php and having it something like this:

function my_function() {
global $post;
$custom_fields = get_post_custom();
$some_field = $custom_fields ['some_field'][0];
?>

<div class="something <?php if ($some_field) { echo $special-clas;} ?>">
<div class="something-else">
/* bunch more of html code */
</div>
</div>
}

And then in the page where you want to use that to echo it?

<html>
<body>
.....
....

<?php echo my_function(); ?>

....

I'm unsure how "accepted" it is to echo out functions?

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  • duanjing9339 2013-03-08 18:38
    关注

    Consider two functions:

    function does_return() {
   return 'foo';
}

function does_echo() {
   echo 'bar';
}

does_return();      // nothing displayed
echo does_return(); // 'foo' displayed

does_echo();        // 'bar' displayed
echo does_echo();   // 'bar' displayed

    In both cases, output CAN be performed, but how it happens differs. Since does_return() does not itself have ANY code to perform output within its definition, output is up to the calling code, e.g. the echo you perform.

    With does_echo(), it doesn't matter how you call the function (with or without echo), since the function does the output itself. you'll get bar regardless.

    Now consider this:

    function this_is_fun();
    echo 'foo';
    return 'bar';
}

this_is_fun();       // outputs 'foo'
echo this_is_fun();  // outputs 'foobar';
    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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