


PHP study notes--Building a PHP development environment---A Dong's column
Jul 29, 2016 am 09:14 AMWhen it comes to PHP, the first thing that comes to my mind is the scene in "The Social Network" in which Mark uses PHP to write Facemash in his dormitory. This is one of the reasons why I learned PHP. I won’t go into too much detail about the advantages of PHP. Just take a look at the famous domestic and foreign websites that use PHP+MySQL technology. To learn a language, you have to start by setting up a development environment.
I am using the Windows 7 operating system. To build a PHP development environment on the Windows platform, you can download the WAMP (acronym for Windows, Apache, MySQL, and PHP) integrated installation package. This eliminates the need to install Apache, MySQL and PHP separately. Since some people’s computers have IIS installed, the default port of IIS is port 80 and Apache also uses port 80. There is more than one way to resolve the conflict. You can modify the httpd.conf file in the Apache installation directory and stop Use IIS, etc. The method I personally use is to change the default port of IIS to port 81. The method is as follows, open the IIS manager and select "Default
Web Site", click "Bind" on the right to modify the port.
Run wampServer, click Apache, there is a test port 80 in the Service directory. In addition to IIS, there are many software that can Occupy port 80, such as Thunder and Kugou. After solving the port conflict problem, you need to make relevant settings for PHP. Check the "short open tag" and remove the check in front of "display errors". Tags like ?> are supported.
As for the IDE, I currently use eclipse, and the ones with good reputation include zend studio and so on. First, let’s introduce how to make eclipse support PHP. Download an eclipse first. After the installation is complete, run eclipse and find "Instal New Software" under Help in the main interface. Then select "All Available Sites" in Work with. After a while, find PDT in "programming language" and go all the way to NEXT.
After installing PDT, you can use eclipse to write PHP
Let me talk about a doubt I encountered during my study today. . Take a look at the code first:
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Looking carefully at the code at places 1 and 2, you can find that there is a single quote before and after submit in place 1, but there are no single quotes in place 2 such as user. If you remove the single quotation mark in place 1, the program will issue a warning, but if you add single quotes in place 2, an error will be reported. Why is this?
In fact, it doesn’t make much difference whether to add single quotes or not. The only difference is that adding single quotes is more efficient than adding no quotes. The reason is that for $_POST[submit] without single quotes, PHP will first check whether the constant submit is defined in the full text of PHP. If it cannot be found, Only then will submit be regarded as a string, and then look for the value of $_POST['submit']; and if quotation marks are added, there will be no step of judging whether submit is a constant, but directly look for $_POST['submit ']; therefore, it is best to add quotation marks everywhere. As for the error of adding single quotation marks in the sql statement, it is in the sql statement. Single quotation marks have been used outside and single quotation marks are used inside. Naturally, it will This causes an error in the SQL statement, in which case slash escaping is required.
The above introduces the PHP study notes - building a PHP development environment - A Dong's column, including the content. I hope it will be helpful to friends who are interested in PHP tutorials.

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To realize text error correction and syntax optimization with AI, you need to follow the following steps: 1. Select a suitable AI model or API, such as Baidu, Tencent API or open source NLP library; 2. Call the API through PHP's curl or Guzzle and process the return results; 3. Display error correction information in the application and allow users to choose whether to adopt it; 4. Use php-l and PHP_CodeSniffer for syntax detection and code optimization; 5. Continuously collect feedback and update the model or rules to improve the effect. When choosing AIAPI, focus on evaluating accuracy, response speed, price and support for PHP. Code optimization should follow PSR specifications, use cache reasonably, avoid circular queries, review code regularly, and use X

1. Maximizing the commercial value of the comment system requires combining native advertising precise delivery, user paid value-added services (such as uploading pictures, top-up comments), influence incentive mechanism based on comment quality, and compliance anonymous data insight monetization; 2. The audit strategy should adopt a combination of pre-audit dynamic keyword filtering and user reporting mechanisms, supplemented by comment quality rating to achieve content hierarchical exposure; 3. Anti-brushing requires the construction of multi-layer defense: reCAPTCHAv3 sensorless verification, Honeypot honeypot field recognition robot, IP and timestamp frequency limit prevents watering, and content pattern recognition marks suspicious comments, and continuously iterate to deal with attacks.

User voice input is captured and sent to the PHP backend through the MediaRecorder API of the front-end JavaScript; 2. PHP saves the audio as a temporary file and calls STTAPI (such as Google or Baidu voice recognition) to convert it into text; 3. PHP sends the text to an AI service (such as OpenAIGPT) to obtain intelligent reply; 4. PHP then calls TTSAPI (such as Baidu or Google voice synthesis) to convert the reply to a voice file; 5. PHP streams the voice file back to the front-end to play, completing interaction. The entire process is dominated by PHP to ensure seamless connection between all links.

PHP ensures inventory deduction atomicity through database transactions and FORUPDATE row locks to prevent high concurrent overselling; 2. Multi-platform inventory consistency depends on centralized management and event-driven synchronization, combining API/Webhook notifications and message queues to ensure reliable data transmission; 3. The alarm mechanism should set low inventory, zero/negative inventory, unsalable sales, replenishment cycles and abnormal fluctuations strategies in different scenarios, and select DingTalk, SMS or Email Responsible Persons according to the urgency, and the alarm information must be complete and clear to achieve business adaptation and rapid response.

PHP does not directly perform AI image processing, but integrates through APIs, because it is good at web development rather than computing-intensive tasks. API integration can achieve professional division of labor, reduce costs, and improve efficiency; 2. Integrating key technologies include using Guzzle or cURL to send HTTP requests, JSON data encoding and decoding, API key security authentication, asynchronous queue processing time-consuming tasks, robust error handling and retry mechanism, image storage and display; 3. Common challenges include API cost out of control, uncontrollable generation results, poor user experience, security risks and difficult data management. The response strategies are setting user quotas and caches, providing propt guidance and multi-picture selection, asynchronous notifications and progress prompts, key environment variable storage and content audit, and cloud storage.

PHP provides an input basis for AI models by collecting user data (such as browsing history, geographical location) and pre-processing; 2. Use curl or gRPC to connect with AI models to obtain click-through rate and conversion rate prediction results; 3. Dynamically adjust advertising display frequency, target population and other strategies based on predictions; 4. Test different advertising variants through A/B and record data, and combine statistical analysis to optimize the effect; 5. Use PHP to monitor traffic sources and user behaviors and integrate with third-party APIs such as GoogleAds to achieve automated delivery and continuous feedback optimization, ultimately improving CTR and CVR and reducing CPC, and fully implementing the closed loop of AI-driven advertising system.

PHPisstillrelevantinmodernenterpriseenvironments.1.ModernPHP(7.xand8.x)offersperformancegains,stricttyping,JITcompilation,andmodernsyntax,makingitsuitableforlarge-scaleapplications.2.PHPintegrateseffectivelyinhybridarchitectures,servingasanAPIgateway
