$_GET的用法详细 / 木子杰软件教程

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$_GET 说明通过 URL 参数传递给当前脚本的变量的数组 Example #1$_GET范例 <?php echo 'Hello ' . htmlspecialchars($_GET["name"]) . '!'; ?> 假设用户访问的是 http://example.com/?name=Hannes 以上例程的输出类似于： Hello Hannes! 注释 Note: "Superglobal"也称为自动化的全局变量。这就表示其在脚本的所有作用域中都是可用的。不需要在函数或方法中用global $variable;来访问它。 Note: GET 是通过urldecode()传递的。例子2：要求：I need write -. $_GET[actor] instead of -. $_GET["actor"] or -. $_GET['actor'] 以下为代码：E.G. URL "http://127.0.0.1/test2.php?actor=14" <?php// CONNECT TO THE DATABASE$DB_HOST='';$DB_USER='';$DB_PASS='';$DB_NAME='';$mysqli= newmysqli($DB_HOST,$DB_USER,$DB_PASS,$DB_NAME); if (mysqli_connect_errno()) {printf("Connect failed: %s\n",mysqli_connect_error()); exit(); }// A QUICK QUERY ON A FAKE USER TABLE$query="SELECT DISTINCT Title FROM movie WHERE ID_movie IN ( SELECT DISTINCT ID_Movie FROM actor_scene WHERE ID_actor=$_GET[actor]) ";$result=$mysqli->query($query) or die($mysqli->error.__LINE__);// GOING THROUGH THE DATAif($result->num_rows>0) { while($row=$result->fetch_assoc()) { echostripslashes($row['Title'])."<br>"; echo" "; } } else { echo'NO RESULTS'; }// CLOSE CONNECTIONmysqli_close($mysqli);?> Maarten Schroeven25-Jul-2011 10:09 You can use this function to remove any $_GET variables out of your URL, it takes an array off strings(the names keys of the $_GET you wish to remove) and returns the url with the ones specified removed <?phpfunctiongetUrlWithout($getNames){$url="http". ((!empty($_SERVER['HTTPS'])) ?"s":"") ."://".$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI'];$questionMarkExp=explode("?",$url);$urlArray=explode("&",$questionMarkExp[1]);$retUrl=$questionMarkExp[0];$retGet="";$found=array(); foreach($getNamesas$id=>$name){ foreach ($urlArrayas$key=>$value){ if(isset($_GET[$name]) &&$value==$name."=".$_GET[$name]) unset($urlArray[$key]); } }$urlArray=array_values($urlArray); foreach ($urlArrayas$key=>$value){ if($key<sizeof($urlArray) &&$retGet!=="")$retGet.="&";$retGet.=$value; } return$retUrl."?".$retGet; }?>Examplecurrent url ishttp://www.example.net/index.php?getVar1=Something&getVar2=10&getVar3=ok<?phpechogetUrlWithout(array("getVar1","getVar3"));//result will be "http://www.example.net/index.php?getVar2=10"?> chris at bjelleklang dot org18-Dec-2010 11:40 Please note that PHP setups with the suhosin patch installed will have a default limit of 512 characters for get parameters. Although bad practice, most browsers (including IE) supports URLs up to around 2000 characters, while Apache has a default of 8000.To add support for long parameters with suhosin, addsuhosin.get.max_value_length = <limit> in php.ini Alberto Lepe dev at alepe dot com05-Oct-2009 06:23 This Function will help you to manage your GET parameters to facilitate coding and prevent duplication. This is a basic version but it can be easily extended.<?php// Author: Alberto Lepe (www.alepe.com) /* Process $_GET to preserve user custom parameters * the arguments is a list of URL parameters that should be removed/changed from URL * for example: * * URL = "index.php?s=1&fi=2&m=4&p=3 * * if called: fixGet("s"); the result has to be: ?fi=2&m=4&p=3 * if called: fixGet("s&m"); the result has to be: ?fi=2&p=3 * if called: fixGet("s=4"); the result has to be: ?s=4&fi=2&m=4&p=3 * if called: fixGet("s=2&m"); the result has to be: ?s=2&fi=2&p=3 * if called: fixGet("s=&m=3"); the result has to be: ?s=&fi=2&m=3&p=3 * if called: fixGet("s=2&m="); the result has to be: ?s=2&fi=2&m=&p=3 * Special: when it ends with a =":" its to leave it open at the end * (just first occurrence) to facilitate concatenation: * if called: fixGet("s=2&m:"); the result has to be: ?s=2&fi=2&p=3&m * if called: fixGet("s=2&m:="); the result has to be: ?s=2&fi=2&p=3&m= * * Usage with HTML (using the URL example above and $id = 99): * * <a href="index.php<?php echo fixGet('m=2&s&fi:=').$id ?>" >Link</a> * Explanation: change "m" to 2, delete "s" and "fi" gets the $id value. ("p" is kept as it is not specified) * will output: <a href='index.php?m=2&p=3&fi=99'>Link</a> */public functionfixGet($args) { if(count($_GET) >0) { if(!empty($args)) {$lastkey="";$pairs=explode("&",$args); foreach($pairsas$pair) { if(strpos($pair,":") !==false) { list($key,$value) =explode(":",$pair); unset($_GET[$key]);$lastkey="&$key$value"; } elseif(strpos($pair,"=") ===false) unset($_GET[$pair]); else { list($key,$value) =explode("=",$pair);$_GET[$key] =$value; } } } return"?".((count($_GET) >0)?http_build_query($_GET).$lastkey:""); }?>To test, copy+paste the following code into testFixGet.php<?php/* * Unit Test for fixGet() */$cases= array (0=> array("s"=>1,"fi"=>2,"m"=>4,"p"=>3),1=> array("s"=>"","fi"=>"","m"=>4,"p"=>3),);$test[0] = array("s"=>"fi=2&m=4&p=3","s&m"=>"fi=2&p=3","s=4"=>"s=4&fi=2&m=4&p=3","s=2&m"=>"s=2&fi=2&p=3","s=&m=3"=>"s=&fi=2&m=3&p=3","s=2&m="=>"s=2&fi=2&m=&p=3","s=2&m:="=>"s=2&fi=2&p=3&m=","z=9"=>"s=1&fi=2&m=4&p=3&z=9","z:"=>"s=1&fi=2&m=4&p=3&z","s:&m=3"=>"fi=2&m=3&p=3&s","s&m=3"=>"fi=2&m=3&p=3",);$test[1] = array("s"=>"fi=&m=4&p=3","s&m"=>"fi=&p=3","s=4"=>"s=4&fi=&m=4&p=3","s=2&m"=>"s=2&fi=&p=3","s=&m=3"=>"s=&fi=&m=3&p=3","s=2&m="=>"s=2&fi=&m=&p=3","s=2&m:="=>"s=2&fi=&p=3&m=","z=9"=>"s=&fi=&m=4&p=3&z=9","z:"=>"s=&fi=&m=4&p=3&z",);foreach($casesas$x=>$value) { echo"<hr> CASE:$x<hr>\n"; foreach($test[$x] as$arg=>$expected) {$_GET=$cases[$x];$res=myForm::fixGet($arg); echo (($res==="?".$expected)?"OK":"NG ($res)")." [$arg]<br>\n"; }}?> slavik032919-Mar-2009 04:01 the addget function below actually has more use when you dont use the recursive merge as such:<?phpfunctionAddGet($ArrayOrString){if(is_array($ArrayOrString))returnhttp_build_query(array_merge($GLOBALS['_GET'],$ArrayOrString));parse_str($ArrayOrString,$output);returnhttp_build_query(array_merge($GLOBALS['_GET'],$output));}?>In this case, if the key is added again with a different value it will be replaced with the new value.addget("change=true"); // ?change=trueaddget("change=false"); // ?change=false timberspine _AT_ gmail _DOT_ com15-May-2008 01:38 Note that named anchors are not part of the query string and are never submitted by the browser to the server.Eg.http://www.xyz-abc.kz/index.php?title=apocalypse.php#doomecho $_GET['title'];// returns "apocalypse.php" and NOT "apocalypse.php#doom"you would be better off treating the named anchor as another query string variable like so:http://www.xyz-abc.kz/index.php?title=apocalypse.php&na=doom...and then retrieve it using something like this:$url = $_GET['title']."#".$_GET['na'];Hope this helps someone...

$_GET的用法详细

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