使用变量名称定义函数？

Question

I need to create a column-system for Wordpress with shortcodes, which is not a problem, but I'm trying to make it with less code.

I have an array with the data needed, I loop through it, create a unique-named function and set it as shortcode-function. The third step is a mystery. How can I create a function from a variable.

Here's an example, how it should be done:

$data[] = "first";
$data[] = "second";
foreach($data as $key => $value) {
    function $value($atts,$content) {
        return '<div class="'.$value.'">'.$content.'</div>';
    }
    add_shortcode($value,$value);
}

However, it seems that it's not possible to make it work like that in PHP. Is there any way to make this work, as I would not want to write all the (identical) functions separated. I could make the shortcode something like [col first]text[/col] but the client wants to have different names for every one of them.

Answer 1

you can use the double dollar syntax to use the value of a variable as a variable identifier,

Example:

$variable = "test";
$$variable = "value of test"

echo $test; //or echo $$variable;

I have never tried but you way want to try:

foreach($data as $key => $value)
{
    function $$value($atts,$content)
    {
    }
    add_shortcode($value,$value);
}

or a function like create_function

if your using PHP 5.3 or greater then you can do something like so:

$$value = function()
{

}

which should work fine