看到一些网站上有图片剪切的功能,觉得挺炫,后来找了一款专用于图片裁切的插件,jquery.Jcrop.min.js,用这个插件可以方便的实现这个功能,使用时鼠标在图片上圈选出选区,即可把图片裁切成所选部分,非常适合用于头像的裁切编辑功能。前端UI分享
演示分为HTML和php两部分:
第一部分,HTML代码:
.代码
- nbsp;html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
-
Jcrop实现图片裁剪 - <script></script>
- <script></script>
- #preview{width:100px;height:100px;border:1px solid #000;overflow:hidden;}
- #imghead{filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(sizingMethod=image);}
- <script> </script>
- jQuery(function(){
- jQuery('#imghead').Jcrop({
- aspectRatio: 1,
- onSelect: updateCoords, //选中区域时执行对应的回调函数
- onChange: updateCoords, //选择区域变化时执行对应的回调函数
- });
- });
- function updateCoords(c)
- {
- jQuery('#x').val(c.x); //选中区域左上角横
- jQuery('#y').val(c.y); //选中区域左上角纵坐标
- //jQuery("#x2").val(c.x2); //选中区域右下角横坐标
- //jQuery("#y2").val(c.y2); //选中区域右下角纵坐标
- jQuery('#w').val(c.w); //选中区域的宽度
- jQuery('#h').val(c.h); //选中区域的高度
- };
- function checkCoords()
- {
- if (parseInt(jQuery('#w').val())>0) return true;
- alert('请选择需要裁切的图片区域.');
- return false;
- };
-
第二部分:PHP处理部分:jquery分享
.代码
- if ($_SERVER['REQUEST_METHOD'] == 'POST')
- {
- $targ_w = $targ_h = 150;
- $jpeg_quality = 90;
- $src = '../image/b4.jpg';
- $img_r = imagecreatefromjpeg($src);
- $dst_r = ImageCreateTrueColor( $targ_w, $targ_h );
- imagecopyresampled($dst_r,$img_r,0,0,$_POST['x'],$_POST['y'],
- $targ_w,$targ_h,$_POST['w'],$_POST['h']);
- header('Content-type: image/jpeg');
- imagejpeg($dst_r,null,$jpeg_quality);
- exit;
- }
- ?>
请将上述两部分代码分别另存为两个文件,文件名自拟。

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.

In PHP, use the clone keyword to create a copy of the object and customize the cloning behavior through the \_\_clone magic method. 1. Use the clone keyword to make a shallow copy, cloning the object's properties but not the object's properties. 2. The \_\_clone method can deeply copy nested objects to avoid shallow copying problems. 3. Pay attention to avoid circular references and performance problems in cloning, and optimize cloning operations to improve efficiency.

PHP is suitable for web development and content management systems, and Python is suitable for data science, machine learning and automation scripts. 1.PHP performs well in building fast and scalable websites and applications and is commonly used in CMS such as WordPress. 2. Python has performed outstandingly in the fields of data science and machine learning, with rich libraries such as NumPy and TensorFlow.


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