PHP fallback函数代码示例

 public function title($post)
 {
     $return = $post->name;
     fallback($return, $post->title_from_excerpt());
     fallback($return, $post->source);
     return $return;
 }

 public function submit()
 {
     if (empty($_POST['video'])) {
         error(__("Error"), __("Video can't be blank."));
     }
     fallback($_POST['slug'], sanitize($_POST['title']));
     return Post::add(array("title" => $_POST['title'], "embed" => $this->embed_tag($_POST['video']), "video" => $_POST['video'], "caption" => $_POST['caption']), $_POST['slug'], Post::check_url($_POST['slug']));
 }

 static function updateCategory($post = array())
 {
     $show_on_home = isset($post['show_on_home']) ? 1 : 0;
     $clean = sanitize(fallback($_POST['clean'], $_POST['name']));
     $name = $post['name'];
     $id = $post['id'];
     SQL::current()->update("categorize", "`id` = :id", array("name" => ":name", "clean" => ":clean", "show_on_home" => ":show_on_home"), array(":id" => $id, ":name" => $name, ":clean" => $clean, ":show_on_home" => $show_on_home));
 }

 public function submit()
 {
     if (empty($_POST['body'])) {
         error(__("Error"), __("Body can't be blank."));
     }
     fallback($_POST['slug'], sanitize($_POST['title']));
     return Post::add(array("title" => $_POST['title'], "body" => $_POST['body']), $_POST['slug'], Post::check_url($_POST['slug']));
 }

 function setAttributesToFallback($default)
 {
     global $langColumns;
     for ($i = 0; $i < count($langColumns); $i++) {
         $id = $langColumns[$i];
         $this->m[$id] = fallback($this->m[$id], $default->m[$id]);
     }
 }

 public function delete_link($text = null, $before = null, $after = null, $classes = "")
 {
     if (!$this->deletable()) {
         return false;
     }
     fallback($text, __("Delete"));
     $name = strtolower(get_class($this));
     echo $before . '<a href="' . url("delete_attachment/" . $this->id, MainController::current()) . '" title="Delete" class="' . ($classes ? $classes . " " : '') . $name . '_delete_link delete_link" id="' . $name . '_delete_' . $this->id . '">' . $text . '</a>' . $after;
 }

function dj_info_box($id = "0", $info = "Keine Infos", $feld_id, $name = "")
{
    global $sp_settings, $userdata, $locale;
    $ausgabe = "";
    if (!isnum($id)) {
        fallback("index.php");
    }
    if ($id > 0) {
        $info_result = dbquery("SELECT * FROM " . DB_USERS . " WHERE user_id='" . $id . "'");
        if (dbrows($info_result) != 0) {
            $user_info = dbarray($info_result);
            if (sp_check($sp_settings['grss_sgroup'], $user_info['user_groups'])) {
                $mod = "<b>" . $locale['grsp124'] . "</b><br />" . $locale['grsp125'] . "<br /><br />";
            } elseif (sp_check($sp_settings['grss_ggroup'], $user_info['user_groups'])) {
                $mod = "<b>" . $locale['grsp124'] . "</b><br />" . $locale['grsp126'] . "<br /><br />";
            } else {
                $mod = "";
            }
            if ($user_info['user_avatar'] != "") {
                $avatar = IMAGES . "avatars/" . $user_info['user_avatar'];
            } else {
                $avatar = IMAGES . "avatars/nopic.gif";
            }
            $infos = "<div align=\\'center\\'><img src=\\'" . $avatar . "\\' /><br /><br /></div><b>" . $locale['grsp122'] . "</b><br /><span class=\\'info2\\'>" . $user_info['user_name'] . "</span><br /><br />" . $mod . "<b>" . $locale['grsp123'] . "</b><br />" . $info . "<br /><br />";
            $ausgabe .= '<a onmouseover="return overlib(\'' . $infos . '\', STICKY, FGCLASS, \'sp1\', BGCLASS, \'sp2\', CAPTIONFONTCLASS, \'a\', CLOSEFONTCLASS, \'a\', CAPTION, \'' . $locale['grsp139'] . '\', RIGHT, CLOSETEXT, \' \');" onmouseout="return nd(\'true\');" href="' . BASEDIR . 'profile.php?lookup=' . $user_info['user_id'] . '">' . ($sp_settings['grss_djpic'] == 1 ? "<img src=\"" . $avatar . "\" height=\"40\" border=\"0\" /><br />" : "") . $user_info['user_name'] . '</a>';
            if ((sp_group($sp_settings['grss_sgroup']) || sp_group($sp_settings['grss_ggroup'])) && $userdata['user_id'] == $user_info['user_id'] || sp_group($sp_settings['grss_agroup']) || iSUPERADMIN) {
                if ($sp_settings['grss_djedit'] == 1 || sp_group($sp_settings['grss_agroup']) || iSUPERADMIN) {
                    $ausgabe .= "<br /><input type='submit' value='" . $locale['grsp130'] . "' class='button' style='width:80px;' onclick='popup=window.open(\"" . INFUSIONS . "gr_sendeplan/gr_sendeplan_popup.php?status=edit&id=" . $feld_id . "\",\"DJ_Admin\",\"toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width=500,height=220,left=250,top=250\"); return false;' />";
                }
                if ($sp_settings['grss_djoff'] == 1 || sp_group($sp_settings['grss_agroup']) || iSUPERADMIN) {
                    $ausgabe .= '<br /><form method="post" action="' . FUSION_SELF . '?id=' . $feld_id . '"><input type="submit" name="sp_delete" value="' . $locale['grsp131'] . '" class="button" style="width:80px;" /></form>';
                }
            }
        }
    } elseif ($id == 0 && $name != "") {
        $infos = "<div align=\\'center\\'><img src=\\'" . IMAGES . "avatars/nopic.gif\\' /><br /><br /></div><b>" . $locale['grsp122'] . "</b><br /><span class=\\'info2\\'>" . $name . "</span><br /><br /><b>" . $locale['grsp123'] . "</b><br />" . $info . "<br /><br />";
        $ausgabe .= '<a onmouseover="return overlib(\'' . $infos . '\', STICKY, FGCLASS, \'sp1\', BGCLASS, \'sp2\', CAPTIONFONTCLASS, \'a\', CLOSEFONTCLASS, \'a\', CAPTION, \'' . $locale['grsp139'] . '\', RIGHT, CLOSETEXT, \' \');" onmouseout="return nd(\'true\');">' . ($sp_settings['grss_djpic'] == 1 ? "<img src=\"" . IMAGES . "avatars/nopic.gif\" height=\"40\" border=\"0\" /><br />" : "") . $name . '</a>';
        if (sp_group($sp_settings['grss_agroup']) || iSUPERADMIN) {
            $ausgabe .= "<br /><input type='submit' value='" . $locale['grsp130'] . "' class='button' style='width:80px;' onclick='popup=window.open(\"" . INFUSIONS . "gr_sendeplan/gr_sendeplan_popup.php?status=edit&id=" . $feld_id . "\",\"DJ_Admin\",\"toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width=500,height=220,left=250,top=250\"); return false;' />";
            $ausgabe .= '<br /><form method="post" action="' . FUSION_SELF . '?id=' . $feld_id . '"><input type="submit" name="sp_delete" value="' . $locale['grsp131'] . '" class="button" style="width:80px;" /></form>';
        }
    }
    if ($ausgabe == "") {
        if ($sp_settings['grss_djon'] == 1 && !($sp_settings['grss_week'] == 1 && $feld_id < 169) && (sp_group($sp_settings['grss_sgroup']) || sp_group($sp_settings['grss_ggroup'])) || sp_group($sp_settings['grss_agroup']) || iSUPERADMIN) {
            $ausgabe .= "<a href='javascript:;' onclick='popup=window.open(\"" . INFUSIONS . "gr_sendeplan/gr_sendeplan_popup.php?status=add&id=" . $feld_id . "\",\"DJ_Admin\",\"toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=1,width=500,height=220,left=250,top=250\"); return false;'>" . $locale['grsp121'] . "</a>";
        } else {
            $ausgabe .= ($sp_settings['grss_djpic'] == 1 && $sp_settings['grss_autodjpic'] == 1 ? "<img src=\"" . INFUSIONS . "gr_sendeplan/autodj.gif\" height=\"40\" border=\"0\" /><br />" : "") . $locale['grsp120'];
        }
    }
    if ($sp_settings['grss_replay'] == 1 && $feld_id > 168 && (sp_group($sp_settings['grss_agroup']) || iSUPERADMIN)) {
        $info_result = dbquery("SELECT * FROM " . DB_GR_SENDEPLAN_REPLAY . " WHERE grsr_re_id='" . $feld_id . "'");
        if (dbrows($info_result) != 0) {
            $ausgabe .= '<form method="post" action="' . FUSION_SELF . '?id=' . $feld_id . '"><input type="submit" name="sp_re_delete" value="' . $locale['grsp140'] . '" class="button" style="width:80px;" /></form>';
        }
    }
    return $ausgabe;
}

 /**
  * Function: __construct
  * Loads the configuration YAML file.
  */
 private function __construct()
 {
     if (!file_exists(INCLUDES_DIR . "/config.yaml.php")) {
         return false;
     }
     $contents = str_replace("<?php header(\"Status: 403\"); exit(\"Access denied.\"); ?>\n", "", file_get_contents(INCLUDES_DIR . "/config.yaml.php"));
     $this->yaml = YAML::load($contents);
     $arrays = array("enabled_modules", "enabled_feathers", "routes");
     foreach ($this->yaml as $setting => $value) {
         if (in_array($setting, $arrays) and empty($value)) {
             $this->{$setting} = array();
         } elseif (!is_int($setting)) {
             $this->{$setting} = is_string($value) ? stripslashes($value) : $value;
         }
     }
     fallback($this->url, $this->chyrp_url);
 }

 public function submit()
 {
     if (!isset($_POST['filename'])) {
         if (isset($_FILES['photo']) and $_FILES['photo']['error'] == 0) {
             $filename = upload($_FILES['photo'], array("jpg", "jpeg", "png", "gif", "bmp"));
         } elseif (!empty($_POST['from_url'])) {
             $filename = upload_from_url($_POST['from_url'], array("jpg", "jpeg", "png", "gif", "bmp"));
         } else {
             error(__("Error"), __("Couldn't upload photo."));
         }
     } else {
         $filename = $_POST['filename'];
     }
     // Prepend scheme if a URL is detected
     if (preg_match('~^((([a-z]|[0-9]|\\-)+)\\.)+([a-z]){2,6}/~', @$_POST['option']['source'])) {
         $_POST['option']['source'] = "http://" . $_POST['option']['source'];
     }
     fallback($_POST['slug'], sanitize($_POST['title']));
     return Post::add(array("title" => $_POST['title'], "filename" => $filename, "caption" => $_POST['caption']), $_POST['slug'], Post::check_url($_POST['slug']));
 }

 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 ***************************************************************************/
require_once '../include/admin.php';
if (!iPDP_ADMIN) {
    fallback('../index.php');
}
/****************************************************************************
 * ACTION
 */
if (isset($_GET['reset_visitors'])) {
    $ok = dbquery("UPDATE " . DB_PDP_DOWNLOADS . "\n\t\tSET\n\t\tcount_visitors='0'");
    if ($ok) {
        fallback(FUSION_SELF . '?done');
    }
}
/****************************************************************************
 * GUI
 */
opentable($locale['PDP016']);
pdp_admin_menu();
if (isset($_GET['done'])) {
    show_info($locale['pdp_done']);
}
/*
 * IMPORT
 */
echo '
<p>

                if ($entry_count > 0) {
                    $entry_error = $locale["PR08"];
                } else {
                    $entry_insert = dbquery("INSERT INTO {$db_prefix}secsys_proxy_whitelist (proxy_ip, proxy_datestamp) VALUES('{$newproxy}','" . time() . "')");
                    if ($entry_insert) {
                        $entry_ok = $locale["PR07"];
                    } else {
                        $entry_error = $locale["PR06"];
                    }
                }
            } else {
                $entry_error = $locale["PR05"];
            }
        }
    }
    opentable($locale["PR01"]);
    echo "<center><a href='" . FUSION_SELF . "?lng=de'><img src='" . SEC_INFDIR . "images/flag-deu.png' border='0' alt='Deutsch' title='Deutsch'></a> <a href='" . FUSION_SELF . "?lng=en'><img src='" . SEC_INFDIR . "images/flag-eng.png' border='0' alt='English' title='English'></a></center><br>";
    if (!empty($_POST) && $entry_error != "") {
        echo "<div class='quote'>" . $entry_error . "</div><br>";
    }
    if (!isset($_POST['pentry'])) {
        echo $locale["PR02"];
        echo "<form action='" . FUSION_SELF . (FUSION_QUERY != "" ? "?" . rawurldecode(FUSION_QUERY) : "") . "' method='post'>\n<input type='hidden' name='newproxy' value='" . USER_IP . "'>" . $locale['PR09'] . ": " . USER_IP . "<br>\n<input type='checkbox' name='reaccept' value='1'>" . $locale['PR03'] . "<br>\n <input type='submit' value='" . $locale['PR04'] . "' name='pentry' class='button'></form>";
    } elseif (empty($entry_error)) {
        echo $entry_ok;
    }
    closetable();
} else {
    fallback(BASEDIR . "index.php");
}
require_once THEMES . "templates/footer.php";

 function fallback_download()
 {
     fallback(INFUSIONS . 'pro_download_panel/download.php?did=' . $this->id);
 }

            if ($data['parentcat'] != $catid) {
                continue;
            }
            if (!checkgroup($data['access']) && $prp->settings['hide_cats']) {
                continue;
            }
            $cnt_cats = prp_count_cats($id);
            $cnt_downs = prp_count_dl($all_cats, $id);
            $cats[$id] = array("name" => $data['name'], "cnt_downs" => $cnt_downs, "cnt_cats" => $cnt_cats, "desc" => parseubb($data['desc']));
        }
    }
    prp_render_cats($catid, $review->id, $path, $cats);
    unset($path, $cats);
    if (!is_null($access_group)) {
        if ($prp->settings['hide_cats']) {
            fallback("error.php?type=access");
        }
        show_info('<img src="icons/lock.png" alt="' . $locale['prp_locked'] . '" /> ' . str_replace('%s', getgroupname($access_group), $locale['PRP215']));
    }
}
/***************************************************************************
 *  DOWNLOADS                                                              *
 ***************************************************************************/
if (is_null($access_group) && !$review->id && (!isset($catid) || $catid != 0)) {
    $rowstart = 0;
    if (isset($_GET['rowstart']) && isNum($_GET['rowstart'])) {
        $rowstart = $_GET['rowstart'];
    }
    $downs = array();
    if (isset($catid)) {
        $get = array('type' => 'cat', 'data' => $catid);

/**
 * Function: relative_time
 * Returns the difference between the given timestamps or now.
 *
 * Parameters:
 *     $time - Timestamp to compare to.
 *     $from - Timestamp to compare from. If not specified, defaults to now.
 *
 * Returns:
 *     A string formatted like "3 days ago" or "3 days from now".
 */
function relative_time($when, $from = null)
{
    fallback($from, time());
    $time = is_numeric($when) ? $when : strtotime($when);
    $difference = $from - $time;
    if ($difference < 0) {
        $word = "from now";
        $difference = -$difference;
    } elseif ($difference > 0) {
        $word = "ago";
    } else {
        return "just now";
    }
    $units = array("second" => 1, "minute" => 60, "hour" => 60 * 60, "day" => 60 * 60 * 24, "week" => 60 * 60 * 24 * 7, "month" => 60 * 60 * 24 * 30, "year" => 60 * 60 * 24 * 365, "decade" => 60 * 60 * 24 * 365 * 10, "century" => 60 * 60 * 24 * 365 * 100, "millennium" => 60 * 60 * 24 * 365 * 1000);
    $possible_units = array();
    foreach ($units as $name => $val) {
        if ($name == "week" and $difference >= $val * 2 or $name != "week" and $difference >= $val) {
            $unit = $possible_units[] = $name;
        }
    }
    $precision = (int) in_array("year", $possible_units);
    $amount = round($difference / $units[$unit], $precision);
    return $amount . " " . pluralize($unit, $amount) . " " . $word;
}

                    <select name="adapter" id="adapter">
                        <?php 
    if (class_exists("PDO") and in_array("mysql", PDO::getAvailableDrivers()) or class_exists("MySQLi") or function_exists("mysql_query")) {
        ?>
                        <option value="mysql"<?php 
        selected("mysql", fallback($_POST['adapter'], "mysql"));
        ?>
>MySQL</option>
                        <?php 
    }
    ?>
                        <?php 
    if (class_exists("PDO") and in_array("sqlite", PDO::getAvailableDrivers())) {
        ?>
                        <option value="sqlite"<?php 
        selected("sqlite", fallback($_POST['adapter'], "mysql"));
        ?>
>SQLite 3</option>
                        <?php 
    }
    ?>
                        <?php 
    if (class_exists("PDO") and in_array("pgsql", PDO::getAvailableDrivers())) {
        ?>
                        <option value="pgsql"<?php 
        selected("pgsql", oneof(@$_POST['adapter'], "mysql"));
        ?>
>PostgreSQL</option>
                        <?php 
    }
    ?>