Código PHP:
<?php
//Windows way
$uploadLocation = "articulos_";
//Unix, Linux way
//$uploadLocation = "\tmp";
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "DTD/xhtml1-transitional.dtd">
<html>
<head>
<title>Subir imagen</title>
<link href="style/style.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="main">
<div id="caption">Subir imagen</div>
<div id="icon"> </div>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" name="fileForm" id="fileForm" enctype="multipart/form-data">
Elegir archivo:<center>
<table>
<tr><td><input name="upfile" type="file" size="36"></td></tr>
<tr><td align="center"><br/><input class="text" type="submit" name="submitBtn" value="Subir"></td></tr>
</table></center>
</form>
<?php
if (isset($_POST['submitBtn'])){
?>
<div id="caption">Resultado</div>
<div id="icon2"> </div>
<div id="result">
<table width="100%">
<?php
$target_path = $uploadLocation . basename( $_FILES['upfile']['name']);
if($_FILES['upfile']['type'] == "image/gif" || $_FILES['upfile']['type'] == "image/jpeg" || $_FILES['upfile']['type'] == "image/png" || $_FILES['upfile']['type'] == "image/pjpeg" || $_FILES['upfile']['type'] == "image/x-png"){
if(move_uploaded_file($_FILES['upfile']['tmp_name'], $target_path)) {
echo "El archivo ". basename( $_FILES['upfile']['name']).
" ha sido subido!";
} else{
echo "Se produjo un error al cargar el archivo, por favor, inténtelo de nuevo!";
}
}else{
echo "Solo se permiten imagenes";
}
?>
</table>
</div>
<?php
}
?>
<div>
</body>
</html>