


[PHP] Several situations of JSON value transfer and PHP reception, several situations of json_PHP tutorial
[PHP] Several cases of JSON value transfer and PHP reception, several cases of json
Using Chrome's background network, analyzed the $.ajax through JQuery () Several situations when posting json data to PHP:
<ul> <li> <p><span><strong>无法</strong></span>在PHP中通过$_POST 以及 $_REQUEST 获取json数据,即</p> <pre class="code"><span>$json</span> = <span>$_POST</span>['json']; <span>//</span><span> empty($json) 为1</span>
Note: PHP only recognizes application/x-www.form-urlencoded standard data types by default. Therefore, the corresponding data types are text/xml or soap or application/octet-stream. The content cannot be parsed, and it will fail if the $_POST array is used to receive it.
Scenario A:
<p>js里<span><strong>没有</strong></span>加入属性contentType: "application/json; charset=utf-8",</p> <pre class="code"><span>var</span> submit_sync = <span>function</span><span>() { $.ajax({ type: </span>"post"<span>, url: </span>'add-post-json.php'<span>, async: </span><span>false</span>, <span>//</span><span> 使用同步方式</span> <span>//</span><span> 1 需要使用JSON.stringify 否则格式为 a=2&b=3&now=14...</span> <span>//</span><span> 2 需要强制类型转换,否则格式为 {"a":"2","b":"3"}</span> <span> data: JSON.stringify({ a: parseInt($(</span>'input[name="a"]'<span>).val()), b: parseInt($(</span>'input[name="b"]'<span>).val()), now: </span><span>new</span> Date().getTime() <span>//</span><span> 注意不要在此行增加逗号</span> <span> }), dataType: </span>"json"<span>, success: </span><span>function</span><span>(data) { $(</span>'#result'<span>).text(data.result); } </span><span>//</span><span> 注意不要在此行增加逗号</span> <span> }); }</span>
- After using $GLOBALS['HTTP_RAW_POST_DATA'], cannot obtain the data, that is,
<span>$json</span> = <span>$GLOBALS</span>['HTTP_RAW_POST_DATA']; <span>//</span><span> empty($json) 为 1</span>
- Use file_get_contents("php://input"); can get the data, that is,
<span>$json</span> = <span>file_get_contents</span>("php://input"); <span>//</span><span> empty($json) 为 0</span>
Scenario B:
<p>js里加入属性contentType: "application/json; charset=utf-8",</p> <pre class="code"><span>var</span> submit_sync = <span>function</span><span>() { $.ajax({ type: </span>"post"<span>, url: </span>'add-post-json.php'<span>, async: </span><span>false</span>, <span>//</span><span> 使用同步方式</span> <span>//</span><span> 1 需要使用JSON.stringify 否则格式为 a=2&b=3&now=14...</span> <span>//</span><span> 2 需要强制类型转换,否则格式为 {"a":"2","b":"3"}</span> <span> data: JSON.stringify({ a: parseInt($(</span>'input[name="a"]'<span>).val()), b: parseInt($(</span>'input[name="b"]'<span>).val()), now: </span><span>new</span> Date().getTime() <span>//</span><span> 注意不要在此行增加逗号</span> <span> }), <span><strong>contentType: </strong></span></span><strong>"application/json; charset=utf-8"</strong><span><span><strong>,</strong></span></span>
<em id="__mceDel"><span> dataType: </span>"json"<span>, success: </span><span>function</span><span>(data) { $(</span>'#result'<span>).text(data.result); } </span><span>//</span><span> 注意不要在此行增加逗号</span> <span> }); }</span></em>
- After using $GLOBALS['HTTP_RAW_POST_DATA'] can get the data, that is,
<span>$json</span> = <span>$GLOBALS</span>['HTTP_RAW_POST_DATA']; <span>//</span><span> empty($json) 为 0</span>
- Use file_get_contents("php://input"); can get the data, that is,
<span>$json</span> = <span>file_get_contents</span>("php://input"); <span>//</span><span> empty($json) 为 0</span>Note: php://input allows reading the raw data of POST. It puts less pressure on memory than $HTTP_RAW_POST_DATA and does not require any special php.ini settings. php://input cannot be used with enctype="multipart/form-data".
Case C:
<p>是否加入以下</p> <pre class="code"><span>header</span>('Content-Type:application/json;charset=utf-8');
There is no impact on the results of case A and case B.
Starting from version 5.2, PHP natively provides json_encode() and json_decode() functions, the former is used for encoding, and the latter is used for decoding. The following blog is very detailed, mark!
Using JSON in PHP language: http://www.ruanyifeng.com/blog/2011/01/json_in_php.html

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

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.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

MantisBT
Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

Dreamweaver Mac version
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

WebStorm Mac version
Useful JavaScript development tools