How to call random Function in PHP

问题:

So I have this functions, I was wondering how can I call the two function randomly. I mean, the php code will randomly select from the two? how can I do that?

Example Functions

    function one() {
        echo '
<div id="two-post">
    <a href="<?php the_permalink(); ?>" alt="<?php the_title(); ?>" title="<?php the_title(); ?>">
        <?php the_post_thumbnail('dos'); ?>

        <div class="entry-meta">
            <h1><?php the_title(); ?></h1>
            <p>By <?php the_author(); ?></p>
        </div>

        <div class="overlay2"></div>
    </a>
</div>

';
    }

    function two() {
        echo '<div class="two">' . wp_trim_words( get_the_content(), 50, '' ) . '</div>';
    }

    function three() { // function names without "-"
        echo '<div class="third">' . the_author() .'</div>';
    }

The code for selecting the two functions randomly

<?php

$functions = array('one', 'two', 'three'); // remove the open and close parenthesis () in the strings

call_user_func($functions[array_rand($functions)]);

?>

The code above doesn't work. Was wonder if someone could help?

回答1:

You can call it something like this:

function one() {
    echo '
        <div id="two-post">
            <a href="' . the_permalink() .'" alt="' . the_title() .'" title="' . the_title() .'">
                ' . the_post_thumbnail('dos') . '

                <div class="entry-meta">
                    <h1>' . the_title() . '</h1>
                    <p>By ' . the_author() . '</p>
                </div>

                <div class="overlay2"></div>
            </a>
        </div>
    ';
}

function two() {
    echo wp_trim_words( get_the_content(), 50, '' );
}

function three() { // function names without "-"
    echo '<div>' . the_author() .'</div>';
}

$functions = array('one', 'two', 'three'); // remove the open and close parenthesis () in the strings

$functions[array_rand($functions)](); // call it!

// or
call_user_func($functions[array_rand($functions)]);

回答2:

You can use Switch case here...

function one(){
             //some code;
             }
function two(){
             //some code;
             }
function random_caller(){
          int x = rand(0,1);
          switch(x){
          case 1: one();
          break;
          case 2: two();
          break;
          default: echo "could not run any function";
          break;
            }
            }

回答3:

Remove the parentheses in the array with function names, like: $a=array("FUNCTION-ONE","FUNCTION-TWO"); And add them on call: echo $a[$random_keys[0]]() . "<br>";

Also, PHP will be a bit annoyed with function names containing the - character (cant name functions like that), so try rename the functions to something like: functionOne (which would also more fit the php standard).

<?php
$functions = array("functionOne","functionTwo");
$function = array_rand($functions); // no second param uses default param which is 1, and will only return one entry.
echo $functions[$function]() ."<br>";
?> 

回答4:

Try this:

function one()   { echo 'ONE'; }
function two()   { echo 'TWO'; }
function three() { echo 'THREE'; }

$functions = array('one', 'two', 'three');
call_user_func($functions[array_rand($functions)]);

---

Or in a function:

function callRandomFunction($functions)
{
    call_user_func($functions[array_rand($functions)]);
}

Called like:

callRandomFunction($functions);