Php 简化代码

Question

如何简化此代码以避免为 3 个不同的值重现相同代码的需要！？例如，在当前代码中，我解析了 3 个 URL 地址以确保它们被定向到正确的目的地，因此人们不会设置各种疯狂的 URL 地址。但在未来，我可能会扩展到更多社交媒体 URLs，一遍又一遍地重复代码会很乏味。谢谢你的时间！

if(isset($_POST['submit'])){

$facebook = strtolower($_POST['facebook']);
$twitter = strtolower($_POST['twitter']);
$youtube = strtolower($_POST['youtube']);



$fb_exp = explode("facebook.com", $facebook);
$tw_exp = explode("twitter.com", $twitter);
$yt_exp = explode("youtube.com", $youtube);



if(($fb_exp[0] == 'http://' || $fb_exp[0] == 'http://www.' || $fb_exp[0] == 'https://' || $fb_exp[0] == 'https://www.' || $fb_exp[0] == '') && $facebook != ''){

    $facebook = 'https://www.facebook.com'.$fb_exp[1];

    $fb = 1;

}elseif($facebook == ''){

    $facebook = '';

    $fb = 1;

}else{

    echo 'Not a Valid Facebook Page !';

}



if(($tw_exp[0] == 'http://' || $tw_exp[0] == 'http://www.' || $tw_exp[0] == 'https://' || $tw_exp[0] == 'https://www.' || $tw_exp[0] == '') && $twitter != ''){

    $twitter = 'https://www.twitter.com'.$tw_exp[1];

    $tw = 1;

}elseif($twitter == ''){

    $twitter = '';

    $tw = 1;

}else{

    echo 'Not a Valid Twutter Page !';

}



if(($yt_exp[0] == 'http://' || $yt_exp[0] == 'http://www.' || $yt_exp[0] == 'https://' || $yt_exp[0] == 'https://www.' || $yt_exp[0] == '') && $youtube != ''){

    $youtube = 'https://www.youtube.com'.$yt_exp[1];

    $yt = 1;

}elseif($youtube == ''){

    $youtube = '';

    $yt = 1;

}else{

    echo 'Not a Valid YouTube Page !';

}



if($fb == 1 && $tw == 1 && $yt == 1){

    $text= '<?php $title="'.$_POST['title'].'";
            $subtitle="'.$_POST['subtitle'].'";
            $email="'.$_POST['email'].'";
            $tel="'.$_POST['tel'].'";
            $add="'.$_POST['add'].'";
            $facebook="'.$facebook.'";
            $twitter="'.$twitter.'";
            $youtube="'.$youtube.'";
            ';
    $fp = fopen('text.ini','w');
    fwrite($fp,$text);
    fclose($fp);
    header('Location: http://somesite.com/index.php');

}

}

Answer 1

使用循环，例如foreach:

if(isset($_POST['submit'])){
  $valid = true;
  $links = [];
  $list = ['facebook' => 'facebook.com', 'twitter' => 'twitter.com', 'youtube' => 'youtube.com'];
  foreach($list as $key => $domain) {
    if(isset($_POST[$key])) {
      $exp = explode($domain, strtolower($link));
      if($link != '' && ($exp[0] == 'http://' || $exp[0] == 'http://www.' || $exp[0] == 'https://' || $exp[0] == 'https://www.' || $exp[0] == '')){
          $links[$key] = 'https://www.'.$domain.$exp[1];
      }elseif($link == ''){
          $links[$key] = '';
      }else{
        echo 'Not a Valid '.ucfirst($key).' Page !';
        $valid = false;
      }
    }
  }

  if($valid) {   
    $text = '<?php $title="'.$_POST['title'].'";
            $subtitle="'.$_POST['subtitle'].'";
            $email="'.$_POST['email'].'";
            $tel="'.$_POST['tel'].'";
            $add="'.$_POST['add'].'";
            $facebook="'.$links['facebook'].'";
            $twitter="'.$links['twitter'].'";
            $youtube="'.$links['youtube'].'";
            ';
    $fp = fopen('text.ini','w');
    fwrite($fp,$text);
    fclose($fp);
    header('Location: http://somesite.com/index.php');
  }
}

正则表达式代替很多条件：

foreach($list as $key => $domain) {
  if(isset($_POST[$key]) && preg_match('#^(?:https?://(?:www\.)?)?('.$domain.'.*)$#i', strtolower($_POST[$key]), $matches)) {
    $links[$key] = 'https://www.' . $matches[1];
  } else {
    echo 'Not a Valid '.ucfirst($key).' Page !';
    $valid = false;
  }
}

Answer 2

您可以使用 parse_url 并使用循环处理数组来简化：

$smPass = 0; 
$correctUrls = array('facebook'=>'https://www.facebook.com','twitter'=>'https://www.twitter.com','youtube'=>'https://www.youtube.com');
$output = array('facebook'=>'','twitter'=>'','youtube'=>'');
foreach($_POST as $social=>$value){

    if(in_array( $social, array_keys($correctUrls) )) {

        if(empty($value)){
            $smPass += 1;
        }
        else {

            if($urlParts = parse_url($value)) {

                if( in_array($urlParts['host'], array_keys($correctUrls)) ) {
                    $output[$social] = $correctUrls[$social].$urlParts['path'].'?'.$urlParts['query'];
                    $smPass += 1;
                }
                else {
                    echo 'Invalid '.$social;
                }
            }
            else {
                echo 'Invalid '.$social;
            }
        }

    }

}
if($smPass == 3){

    $text= '<?php $title="'.$_POST['title'].'";
            $subtitle="'.$_POST['subtitle'].'";
            $email="'.$_POST['email'].'";
            $tel="'.$_POST['tel'].'";
            $add="'.$_POST['add'].'";
            $facebook="'.$output['facebook'].'";
            $twitter="'.$output['twitter'].'";
            $youtube="'.$output['youtube'].'";
            ';
    $fp = fopen('text.ini','w');
    fwrite($fp,$text);
    fclose($fp);
    header('Location: http://somesite.com/index.php');

}

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