[plugin] gimana cara nambah script di plugin

gan, ane mau tanya gimana caranya nambah script buat bikin file PDF ke plugins. tapi yang di print itu bukan yang dihalaman POST, tapi justru dihalaman admin.

lalu script yang dijadikan PDF itu kaya gini gan.

echo "<h2>PDF</h2>";
    global $wpdb;
    $ID = $_GET[ID];
	$custom = get_post_custom($ID);
	$custom["thumbs"] = isset($custom["thumbs"][0]) ? unserialize($custom["thumbs"][0]) : array();
   ?>
   <style type="text/css">
		hr{ margin-right:17px;	}
   </style>
	<form method="GET" action="../cari.php">
	<input type="text" name="ID" placeholder="Masukkan ID"/>
	<input type="hidden" name="jenis" value="SavePdf"/>
	<a href="<?php echo WP_PLUGIN_URL . '/DB/coba.php?ID='.$ID; ?> ">Download</a>
	<input type="Submit" value="pdf" />
    </form>
	<hr />
	<div id="show">
	<div id="gambar" style="height:450px;">
		<span style="float:left; margin-right:5px;">
		<?php $i=0; ?>
		<?php echo et_new_thumb_resize( et_multisite_thumbnail($custom["thumbs"][$i]), 457, 457 ); ?>
        <span class="overlay"></span>
        </span>

        <span style="border-left: black solid 2px; padding-left:5px; float:left; margin-right:5px;">
        <?php for ($i = 1; $i <= count($custom["thumbs"])-1; $i++) { ?>
			<span class="small-controller<?php if($i==0) echo(' active'); if ($i==count($custom["thumbs"])-1) echo(' last') ?>" rel="<?php echo($i+1); ?>">
			<?php echo et_new_thumb_resize( et_multisite_thumbnail($custom["thumbs"][$i]), 150, 150 );
			?>
			</span>
		<?php
		if($i % 3 == 0){
			echo"</span><span style='margin-right:5px;'>";
		}else{
			echo"<br />";
		}
		 // habis
		}; ?>
		</span>
	</div>
	<br />
	<div style="margin-top:-20px;">

		<?php
		//memunculkan keterangan gambar
		global $wpdb;
		$id_posting = $_GET[ID];
		$query = "SELECT $wpdb->supple_hore.*, $wpdb->pilihanganda.value
				  FROM $wpdb->supple_hore INNER JOIN $wpdb->pilihanganda
				  ON $wpdb->supple_hore.post_id = $wpdb->pilihanganda.post_id
				  WHERE $wpdb->supple_hore.post_id= $id_posting
				  AND $wpdb->pilihanganda.katakunci='Status' LIMIT 0,1";
		$hitung = "SELECT COUNT(*) FROM $wpdb->pilihanganda WHERE post_id = $id_posting AND katakunci='Status'";
		$hasil = $wpdb->get_var($hitung);
		$ron = $wpdb->get_results($query);
		if($ron <> ''){
			echo"<table>";
			foreach($ron as $rons){
				echo"<tr><td colspan='2'>";
				if($hasil <> 2){
					echo"<i><h1>".$rons->tipeproperty." ".$rons->value."</h1></i>";
				}else{
					echo"<i><h1>".$rons->tipeproperty." Dijual dan Disewakan</h1><i>";
				}
				echo"</td></tr>";
				echo"<tr><td style='text-align:right; padding-right:7px; width:270px; border-right: solid 2px'>";
				$marketing = $rons->marketing2;
				if($marketing == ''){
					echo "<h2 style='margin-top:10px;'>".$rons->alamat.", ".$rons->wilayah.", ".$rons->Kota."</h2><i><h3>Listed by ".$rons->marketing."</h3></i>";
				}else{
					echo "<h2 style='margin-top:10px;'>".$rons->alamat.", ".$rons->wilayah.", ".$rons->Kota."</h2><i><h3>Listed by ".$rons->marketing."&".$rons->marketing2."</h3></i>";
				}
				echo"</td><td><div>";
				// oke asolole
					$tipe = $rons->tipeproperty;
					switch($tipe){
						case "Rumah": // RUMAH
							echo "Luas tanah ".$rons->LT." m2<br/>";
							echo "Luas bangunan ".$rons->LB." m2<br/>";
						$hadap = $rons->orientasi2;
						if($hadap == ''){
							echo "Orientasi hadap ".$rons->orientasi." <br/>";
						}else{
							echo "Orientasi hadap ".$rons->orientasi." & ".$rons->orientasi2." <br/>";
						}
							echo $rons->tingkat." Lantai, ".$rons->k_tidur." Kamar tidur, ".$rons->k_mandi." Kamar mandi <br/>";
							$i=0;
							$querys = "SELECT *
							  FROM <code>$wpdb->pilihanganda</code>
							  WHERE <code>post_id</code>= $id_posting
							  AND <code>katakunci</code>='ruangan'
							  ORDER BY 'id'";
							$sql = $wpdb->get_results($querys);
								if($sql <> ''){
									foreach( $sql as $dataSql ){
											echo $dataSql->value.", ";
										$i++;
										if($i % 3 == 0){
											echo"<br/>";
										}
									}
								}else{
									echo"Ruangan Belum Tersedia";
								}
							echo"<br/>";
							echo"Listrik ".$rons->listrik." watt, Air ".$rons->air.", ".$rons->telpon." Line telpon <br/>".$rons->sertifikat."<br/>";

						break;
						case "Ruko": // RUKO
							echo "Luas tanah ".$rons->LT." m2<br/>";
							echo "Luas bangunan ".$rons->LB." m2<br/>";
							echo $rons->tingkat." Lantai, ".$rons->k_tidur." Kamar tidur, ".$rons->k_mandi." Kamar mandi <br/>";
							$i=0;
							$querys = "SELECT *
							  FROM <code>$wpdb->pilihanganda</code>
							  WHERE <code>post_id</code>= $id_posting
							  AND <code>katakunci</code>='ruangan'
							  ORDER BY 'id'";
							$sql = $wpdb->get_results($querys);
								if($sql <> ''){
									foreach( $sql as $dataSql ){
											echo $dataSql->value.", ";
										$i++;
										if($i % 3 == 0){
											echo"<br/>";
										}
									}
								}else{
									echo"Ruangan Belum Tersedia";
								}
							echo"Listrik ".$rons->listrik." watt, Air ".$rons->air.", ".$rons->telpon." Line telpon <br/>".$rons->sertifikat."<br/>";
						break;
						case "Tanah": // TANAH
							echo "Luas tanah ".$rons->LT." m2<br/>";
						$hadap = $rons->orientasi2;
						if($hadap == ''){
							echo "Orientasi hadap ".$rons->orientasi." <br/>";
						}else{
							echo "Orientasi hadap ".$rons->orientasi." & ".$rons->orientasi2." <br/>";
						}
							echo "Surat IMB ".$rons->imb."<br/>";
							echo "Sertifikat ".$rons->sertifikat."<br/>";
							echo "Harga permeter Rp.".number_format(esc_html($rons->harga_m2), 0, ',',',')."/m2<br/>";
						break;
						case "Stan": // STAN
							echo "Luas tanah ".$rons->LT." m2<br/>";
							echo "Luas bangunan ".$rons->LB." m2<br/>";
							echo $rons->dimensi_LB." Kamar mandi<br/>";
							echo"Listrik ".$rons->listrik." watt, Air ".$rons->air.", ".$rons->sertifikat."<br/>";
						break;
						case "Pabrik": // PABRIK
							echo "Luas tanah ".$rons->LT." m2<br/>";
							echo "Luas bangunan ".$rons->LB." m2<br/>";
							echo $rons->k_mandi." Kamar mandi <br/>";
							echo "Surat IMB ".$rons->imb."<br/>";
							echo "Listrik ".$rons->listrik." watt, Air ".$rons->air.", ".$rons->telpon." Line telpon <br/>".$rons->sertifikat."<br/>";
						break;
						case "Kavling": //KAVLING
							echo "Luas tanah ".$rons->LT." m2<br/>";
							echo "Dimensi luas tanah ".$rons->dimensi_LT." m2<br/>";
							echo"Listrik ".$rons->listrik." watt, Air ".$rons->air.", ".$rons->sertifikat."<br/>";
							echo "Harga permeter Rp.".number_format(esc_html($rons->harga_m2), 0, ',',',')."/m2<br/>";
						break;
						case "Gudang": //GUDANG
							echo "Luas tanah ".$rons->LT." m2<br/>";
							echo "Dimensi luas tanah ".$rons->dimensi_LT." m2<br/>";
							echo "Luas bangunan ".$rons->LB." m2<br/>";
							echo "Dimensi luas bangunan ".$rons->dimensi_LB." m2<br/>";
							echo $rons->k_mandi." Kamar mandi, ";
							echo "Listrik ".$rons->listrik." watt, Air ".$rons->air.", ".$rons->telpon." Line telpon <br/>".$rons->sertifikat."<br/>";
							echo "Harga permeter Rp.".number_format(esc_html($rons->harga_m2), 0, ',',',')."/m2<br/>";
						break;
						case "Rumah Burung": //Rumah Burung
							echo "Luas tanah ".$rons->LT." m2<br/>";
							echo "Luas bangunan ".$rons->LB." m2<br/>";
							echo "Dimensi luas bangunan ".$rons->dimensi_LB." m2<br/>";
						default:
						break;
					} //akhir dari switch status
					if($hasil <> 2){
								$statusProperty = $rons->value;
								if($statusProperty == "Dijual"){
									echo"<h1>Harga Jual Rp.".number_format(esc_html($rons->harga_jual), 0, ',',',')." </h1>";
								}else{
									echo"<h1>Harga Sewa Rp.".number_format(esc_html($rons->harga_sewa), 0, ',',',')." </h1>";
								}
							}else{
								echo"<h3> Harga Jual Rp.".number_format(esc_html($rons->harga_jual), 0, ',',',')."<br />
								Harga Sewa Rp.".number_format(esc_html($rons->harga_sewa), 0, ',',',')."
								<br/></h3>";
							}
				echo"</div></td></tr>";
			}
		}
		?>
	</div>
	</div>