如果不立即调用php函数，我应该依赖什么？

Question

I've tried regular functions and call_user_function, both which do not finish executing before they get to the next line after a function call. What do people use instead? Should I just include a separate php file for every "function" I want to run?

edit:

$IDNum = 0;


$restartButtonIDName;

$playButtonIDName;

$audioPlayerIDName;

$MP3AudioSourceIDName;
$OGGAudioSourceIDName;

$resultingTextIDName;

$currentTimeIDName;

$checkOffsetIDName;



call_user_func('setIDNames');



function setIDNames() {

    echo "called setIDNames <br />";

    call_user_func('incIDNums');

    $restartButtonIDName = "restartButton".$IDNum;

    $playButtonIDName = "playButton".$IDNum;

    $audioPlayerIDName = "audioPlayer".$IDNum;

    $MP3AudioSourceIDName = "MP3AudioSource".$IDNum;
    $OGGAudioSourceIDName = "OGGAudioSource".$IDNum;

    $resultingTextIDName = "resultingText".$IDNum;

    $currentTimeIDName = "currentTime".$IDNum;

    $checkOffsetIDName = "checkOffset".$IDNum;


}

function incIDNums(){

    echo "called setIDNums <br />";

    $IDNum += 1;

}

echo $restartButtonIDName." test<br />"; // echos "test" not the resulting name


?>

Answer 1

Variables accessed inside a function are not the same as variables outside the function, or in a different function, unless you declare the variables with a global statement inside the function.

$IDNum = 0;
incIDNums();
echo $IDNum; // Will echo 1

function incIDNums(){
    global $IDNum;

    echo "called setIDNums <br />";
    $IDNum += 1;

}

It's generally considered poor style to depend heavily on global variables, as it impairs the generality of the functions. The function should get its input via parameters, and sends the results as a value using return. If you need to return multiple results, you can package them into an array, or use reference parameters that are updated in place.