<HTML><HEAD>
<SCRIPT>function getImageDimension (imgURL, loadHandler) {
var img = new Image();
img.onload = loadHandler;
if (document.layers && location.protocol.toLowerCase() != 'file:' && navigator.javaEnabled())
netscape.security.PrivilegeManager.enablePrivilege( 'UniversalFileRead'
); img.src = imgURL;}
function getFileSize (fileName) {
if (document.layers) {
if (navigator.javaEnabled()) {
var file = new java.io.File(fileName);
if (location.protocol.toLowerCase() != 'file:')
netscape.security.PrivilegeManager.enablePrivilege(
'UniversalFileRead' );
return file.length(); }
else return -1; }
else if (document.all) {
window.oldOnError = window.onerror;
window.onerror = function (err) {
if (err.indexOf('utomation') != -1) {
alert('file access not possible');
return true;
}
else
return false; };
var fso = new ActiveXObject('Scripting.FileSystemObject');
var file = fso.GetFile(fileName);
window.onerror = window.oldOnError;
return file.Size; }}
function showImageDimensions () {
alert(this.width + 'x' + this.height);}
</SCRIPT>
<SCRIPT>
function checkImageDimensions (fileName) {
var imgURL = 'file:///' + fileName;
getImageDimension(imgURL, showImageDimensions);}
</SCRIPT>
</HEAD
><BODY>
<FORM NAME="formName"><INPUT TYPE="file" NAME="fileName"><BR>
<INPUT TYPE="button" VALUE="check file size"
ONCLICK="alert(getFileSize(this.form.fileName.value))"><BR>
<INPUT TYPE="button" VALUE="check image dimensions"
ONCLICK="checkImageDimensions(this.form.fileName.value)"></FORM></BODY>
</HTML>
<SCRIPT>function getImageDimension (imgURL, loadHandler) {
var img = new Image();
img.onload = loadHandler;
if (document.layers && location.protocol.toLowerCase() != 'file:' && navigator.javaEnabled())
netscape.security.PrivilegeManager.enablePrivilege( 'UniversalFileRead'
); img.src = imgURL;}
function getFileSize (fileName) {
if (document.layers) {
if (navigator.javaEnabled()) {
var file = new java.io.File(fileName);
if (location.protocol.toLowerCase() != 'file:')
netscape.security.PrivilegeManager.enablePrivilege(
'UniversalFileRead' );
return file.length(); }
else return -1; }
else if (document.all) {
window.oldOnError = window.onerror;
window.onerror = function (err) {
if (err.indexOf('utomation') != -1) {
alert('file access not possible');
return true;
}
else
return false; };
var fso = new ActiveXObject('Scripting.FileSystemObject');
var file = fso.GetFile(fileName);
window.onerror = window.oldOnError;
return file.Size; }}
function showImageDimensions () {
alert(this.width + 'x' + this.height);}
</SCRIPT>
<SCRIPT>
function checkImageDimensions (fileName) {
var imgURL = 'file:///' + fileName;
getImageDimension(imgURL, showImageDimensions);}
</SCRIPT>
</HEAD
><BODY>
<FORM NAME="formName"><INPUT TYPE="file" NAME="fileName"><BR>
<INPUT TYPE="button" VALUE="check file size"
ONCLICK="alert(getFileSize(this.form.fileName.value))"><BR>
<INPUT TYPE="button" VALUE="check image dimensions"
ONCLICK="checkImageDimensions(this.form.fileName.value)"></FORM></BODY>
</HTML>
取得图片的长宽。语法: array getimagesize(string filename, array [imageinfo]);返回值: 数组函数种类: 图形处理
内容说明
本函数可用来取得 GIF、JPEG 及 PNG 三种 WWW 上图片的高与宽,不需要安装 GD library 就可以使用本函数。返回的数组有四个元素。返回数组的第一个元素 (索引值 0) 是图片的高度,单位是像素 (pixel)。第二个元素 (索引值 1) 是图片的宽度。第三个元素 (索引值 2) 是图片的文件格式,其值 1 为 GIF 格式、 2 为 JPEG/JPG 格式、3 为 PNG 格式。第四个元素 (索引值 3) 为图片的高与宽字符串,height=xxx width=yyy。可省略的参数 imageinfo 用来取得一些图片的相关信息,例如 IPTC (http://www.xe.net/iptc) 的 APP13 标记,就可以加在图片中,可利用 iptcparse() 来解析。
使用范例
<?php
function MyImg($imgfile) {
$size = GetImageSize($imgfile);
echo "<img src=\"$imgfile\" $size[3]>";
}
MyImg("img/img1.gif");
MyImg("img/img2.png");
?> --------------------------------------------------------------------------------整理: sadly (www.phpx.com)