我想将键盘控制左箭头键和右箭头键添加到脚本中：
http://xenforo.com/community/threads/php-file-that-basically-functions-as-folder-image-viewer.14658/
左箭头=后退，右箭头=下一步。
每次我把功能放在前面？＆gt;它总是返回错误。
我使用这种方法
$("document").keypress(function (e) { //always error here
if(e.keyCode == 37) { // left
//back (what here next i don't know too)
}
else if(e.keyCode == 39) { // right
//next
}
});
这里是完整的脚本
<?php
// ------------------------------------------------------------------------- //
// Comic Gallery 1.2 //
// ------------------------------------------------------------------------- //
// Copyright (C) 2005 Stuart Robertson //
// http://www.designmeme.com/ //
// ------------------------------------------------------------------------- //
// 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. //
// A summary is available at http://creativecommons.org/licenses/GPL/2.0/ //
// ------------------------------------------------------------------------- //
// Edit the code below to configure your Comic Gallery //
// ------------------------------------------------------------------------- //
// Your images directory, relative to the page calling this script
$imagedir="comics";
// To start at the last image use "last"
$startimage="first";
// Copyright name to display, for none use " "
$copyright=" ";
// Creative Commons license, for none use " "
// example: "http://creativecommons.org/licenses/by/2.0/"
$creativecommons=" ";
// type of divider, for none use " "
$divider="·";
// show arrows, for none use 0
$arrows=1;
// show back and next, for none use 0
$backnext=1;
// show back and next, for none use 0
$firstlast=1;
// show numbers, for none use 0
$numbers=1;
// numbers per line
$linelength=10;
// navigation position, for aboe use "above"
$navplacement="below";
// ------------------------------------------------------------------------- //
// Do not edit below this line
// ------------------------------------------------------------------------- //
// initialize variables
$pics=array();
$count=0;
// Open the directory
$comicdir=opendir($imagedir);
// read directory into pics array
while (($file = readdir($comicdir))!==false) {
// filter for jpg, gif or png files...
if (substr($file,-4) == ".jpg" || substr($file,-4) == ".gif" || substr($file,-4) == ".png" || substr($file,-4) == ".JPG" || substr($file,-4) == ".GIF" || substr($file,-4) == ".PNG"){
$pics[$count] = $file;
$count++;
}
}
closedir($comicdir);
// check for the picture to view
$pic=$_GET['p'];
// if no picture variable...
if ($pic=="") {
if ($startimage!="last"){ $pic=1; }
else { $pic=$count; }
}
// sort the filenames alphabetically
sort($pics);
reset($pics);
// determine which picture to get
for ($f=0;$f<=sizeof($pics)-1;$f++){if ($pic==$pics[$f]){$selected = $f+1;}}
// check for javascript...
if ($pic && !preg_match("/javascript/",$pic)){
// get current image file
$current=$pics[$pic-1];
$next=$pic+1;
if ($next > sizeof($pics)){ $next=sizeof($pics); }
$back=$pic-1;
if ($back < 1){ $back=1; }
// display image above nav
if ($navplacement!="above"){
if (substr($current,-4) == ".jpg" || substr($current,-4) == ".gif" || substr($current,-4) == ".png" || substr($current,-4) == ".JPG" || substr($current,-4) == ".GIF" || substr($current,-4) == ".PNG"){
if ($pic < sizeof($pics)){
echo"\n<p id=\"cg_img\"><a href=\"?p=".$next."\"><img src=\"".$imagedir."/".$current."\" alt=\"Next\" /></a></p>\n";
} else {
echo"\n<p id=\"cg_img\"><img src=\"".$imagedir."/".$current."\" alt=\"End\" /></p>\n";
}
}
}
// display back and next
if ($backnext != 0 || $arrows != 0){
if (sizeof($pics) > 1){
echo "<p id=\"cg_nav1\">";
if ($firstlast != 0){
if ($pic > 1){ echo "<a href=\"?p=1\" id=\"cg_first\"><span>First</span></a>"; }
else { echo "<span id=\"cg_first\"><span>First</span></span>"; }
echo "<span class=\"cg_divider\"> ".$divider." </span>";
}
if ($pic > 1){
echo "<a href=\"?p=".$back."\" id=\"cg_back\"><span>";
if ($arrows != 0) { echo "« "; }
if ($backnext != 0) { echo "Back"; }
echo "</span></a>";
} else {
echo "<span id=\"cg_back\"><span>";
if ($arrows != 0) { echo "« "; }
if ($backnext != 0) { echo "Back"; }
echo "</span></span>";
}
echo "<span class=\"cg_divider\"> ".$divider." </span>";
if ($pic < sizeof($pics)){
echo "<a href=\"?p=".$next."\" id=\"cg_next\"><span>";
if ($backnext != 0) { echo "Next"; }
if ($arrows != 0) { echo " »"; }
echo "</span></a>";
} else {
echo "<span id=\"cg_next\"><span>";
if ($backnext != 0) { echo "Next"; }
if ($arrows != 0) { echo " »"; }
echo "</span></span>";
}
if ($firstlast != 0){
echo "<span class=\"cg_divider\"> ".$divider." </span>";
if ($pic < sizeof($pics)){ echo "<a href=\"?p=". sizeof($pics) ."\" id=\"cg_last\"><span>Last</span></a>"; }
else { echo "<span id=\"cg_last\"><span>Last</span></span>"; }
}
echo "</p>\n";
}
}
// display numbers
if ($numbers != 0){
if (sizeof($pics) > 1){
// display textlinks
echo "<p id=\"cg_nav2\">";
// loop over images
for ($f=1;$f<=sizeof($pics);$f++){
// if the link to the pic is the selected one, display a bold number and no link
if ($pic==$f){echo "<b>".$f."</b>";}
// otherwise display the link
else{echo "<a href=\"?p=".$f."\">".$f."</a>";}
// add dividers and linebreaks
if (($f % $linelength) == 0) {
echo "<br />";
}
else {
if ($f!=sizeof($pics)){
echo "<span class=\"cg_divider\"> ".$divider." </span>";
}
}
}
echo "</p>\n";
}
}
// display image below nav
if ($navplacement=="above"){
if (substr($current,-4) == ".jpg" || substr($current,-4) == ".gif" || substr($current,-4) == ".png" || substr($current,-4) == ".JPG" || substr($current,-4) == ".GIF" || substr($current,-4) == ".PNG"){
if ($pic < sizeof($pics)){
echo"\n<p id=\"cg_img\"><a href=\"?p=".$next."\"><image src=\"".$imagedir."/".$current."\" alt=\"Next\" border=\"0\"></a></p>\n";
} else {
echo"\n<p id=\"cg_img\"><image src=\"".$imagedir."/".$current."\" alt=\"End\" /></p>\n";
}
}
}
// display copyright
echo "<p id=\"cg_credits\">";
if ($creativecommons != " "){ echo "<a href=\"".$creativecommons."\" title=\"Creative Commons License\">Some Rights Reserved</a> ".$divider." "; }
else {
if ($copyright != " "){ echo "© ".$copyright." ".$divider." "; }
}
// If you make use of this script, be nice and keep the link back to my site :-)
echo "Powered by <a href=\"http://designmeme.blogspot.com/2005/05/comic-gallery-script.html/\">ComicGallery</a></p>\n";
}
?>
答案 0 :(得分：1)
PHP和JavaScript是两种独立的编程语言 - 您不能将它们混合在一起。当您将jQuery方法直接放在PHP代码中时（例如，在'？＆gt;'之前，您告诉PHP运行该代码 - 但PHP不知道如何，因为它使用的是另一种语言。
相反，请尝试将方法置于PHP的标记之外（<? ... ?>）或echo，具体取决于页面其余部分的设置方式。
欢迎来到Stack Overflow！
答案 1 :(得分：0)
好的，谢谢@tbd，echo这个方法很精彩。
像魅力一样工作
echo "<script type=\"text/javascript\">" ;
echo "function keyNav( e )"; echo "{ ";
echo "if( !e )"; echo"{ e = window.event; }" ;
echo "goBack = 37;" ;
echo "goNext = 39;" ;
echo "switch( e.keyCode )";
echo "{";
echo "case goBack: window.location.href='?p=".$back."\ '
break;";
echo "case goNext: window.location.href='?p=".$next."\ '
break;";
echo "}";
echo "}";
echo "document.onkeydown = keyNav;";
echo "</script>";
太多echo我不知道是否有更简单的方法，但这个对我来说已经足够了，谢谢。