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- What is the ping attribute on an HTML anchor tag
- ThepingattributeinanHTMLanchortagenablesbackgroundtrackingofoutboundlinkclicksbysendingaPOSTrequesttospecifiedURLswhenausernavigatestoalink;1.ItworkswithoutJavaScript,sendingalightweight,asynchronouspingwithPing-FromandPing-Toheaderstooneormoretracki
- HTML Tutorial . Web Front-end 432 2025-08-04 09:22:02
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- Implementing CSRF Tokens to Secure Your $_POST Requests Against Forgery
- Generate and store secure CSRF tokens: use random_bytes() to generate encrypted secure tokens and deposit $_SESSION at the beginning of the session; 2. Insert the token as a hidden field into the form and output through htmlspecialchars() to prevent XSS; 3. Use hash_equals() in the processing script to verify whether the submitted token is consistent with the token stored in the session, and if the verification fails, it will return a 403 error; 4. The token should be invalidated and regenerated after sensitive operations; 5. Always transmit via HTTPS, avoid exposing the token in the URL, and do not use GET for state changes, and combine SameSite=Strict or Lax session cookies
- PHP Tutorial . Backend Development 720 2025-08-04 09:13:01
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- How to comment in an HTML file
- The way to write HTML comments is to wrap the contents, and the browser will ignore the contents; 1. The basic syntax is; 2. It can be used to add development notes, such as; 3. The code can be temporarily commented for debugging, such as; 4. Multi-line comments are supported, but cannot be nested; 5. Comments are visible to those who view the source code and should not contain sensitive information. Correct use can improve code maintainability.
- HTML Tutorial . Web Front-end 322 2025-08-04 09:12:02
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- What are the Best Practices for MySQL Database Security?
- Usestrongpasswordswiththevalidate_passwordplugin,applyleastprivilegebygrantingminimalnecessarypermissions,renameorrestrictthedefaultrootaccount,andremoveunusedaccounts.2.BindMySQLtointernalinterfaces,usefirewallstolimitaccesstotrustedIPs,enableSSL/TL
- Mysql Tutorial . Database 164 2025-08-04 08:37:01
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- How to add a comment in your HTML code
- To add HTML comments, use syntax; 1. Write at the beginning of the comment; 2. It can be used to interpret the code, disable the code, or mark the to-do items; 3. Comments will not be displayed on the page but can be viewed in the source code; 4. Comments cannot be nested; 5. Avoid following the HTML tag immediately after the -- and spaces should be added before and after the tag to ensure safety.
- HTML Tutorial . Web Front-end 500 2025-08-04 08:35:03
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- Analyzing Time Complexity of Key Operations in PHP Associative Arrays
- PHPassociativearraysareimplementedasorderedhashtables,enablingefficientkey-valueoperations;1.Insertion:averageO(1),worstO(n)duetocollisionsorresizing;2.Lookup:averageO(1),worstO(n)withcollisions;3.Deletion:averageO(1),worstO(n)ifmanycollisions;4.Keyc
- PHP Tutorial . Backend Development 196 2025-08-04 08:29:01
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- MySQL Serverless Architectures and Use Cases
- MySQL itself does not support the Serverless architecture, but cloud manufacturers such as AWS and Alibaba Cloud have launched ServerlessMySQL products, which can achieve automatic scaling and on-demand billing by encapsulating underlying resources. Suitable scenarios include: 1. Applications with large fluctuations in access volume, which can automatically expand and save resources; 2. Small project or MVP prototype development to reduce initial costs and operation and maintenance complexity; 3. Event-driven applications, coordinated with function calculation to achieve elastic access. When using it, you need to pay attention to cold start delay, concurrency restrictions, long-term high load costs and cross-region delay issues. Compatibility, scaling strategy, cold start time, cost transparency and operation and maintenance functions should be evaluated when selecting a plan.
- Mysql Tutorial . Database 484 2025-08-04 08:13:01
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- How to create a responsive image comparison slider with CSS?
- To create a responsive image comparison slider, you must first build an HTML structure containing the front and back images and separation bars; 2. Use CSS to set relative units and object-fit to ensure layout adaptability; 3. Control the display range of the "before contrast" pictures through width or clip-path; 4. Add JavaScript to achieve sliding interaction between mouse and touch events; 5. Optimize styles for mobile devices and ensure touch support, and finally realize a responsive image comparison function that does not require a third-party library, is compatible with modern browsers, and fully supports desktop and mobile user interaction.
- CSS Tutorial . Web Front-end 306 2025-08-04 08:07:01
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- How to link to a specific section of an HTML page
- AssignauniqueidattributetothetargetHTMLelement,suchas;2.Createalinkusingthehashsymbolfollowedbytheid,likeGotoSection1;3.Tolinkfromanotherpage,includethefragmentintheURL,e.g.,GotoSection1onAboutPage,ensuringsmoothnavigationtothetargetsection,andfollow
- HTML Tutorial . Web Front-end 547 2025-08-04 08:04:02
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- Implementing `Iterator` and `IteratorAggregate` for Custom Object Iteration
- To make PHP custom objects iterable, you can choose IteratorAggregate or Iterator interface; 1. When using IteratorAggregate, you only need to implement the getIterator() method and return a Traversable object, which is suitable for simply wrapping existing collections; 2. When using Iterator, you need to implement five methods: rewind, current, key, next and valid, which are suitable for scenarios where it requires fine control of the iteration process; you should choose the appropriate method based on whether complex iteration logic is needed, both of which ensure that the object can be used in foreach.
- PHP Tutorial . Backend Development 944 2025-08-04 08:01:01
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- Securing MySQL with Intrusion Detection Systems (IDS)
- IDS is an intrusion detection system that can monitor MySQL's abnormal access behavior, such as brute force cracking, SQL injection, etc., to improve security visibility. It discovers suspicious actions and alerts by analyzing logs or traffic. Deployment methods include: 1. Use OSSEC to monitor MySQL logs; 2. Use Snort/Suricata to analyze network traffic; 3. Configure Fail2ban to block abnormal IP; 4. Use commercial IDS/IPS system. The steps to configure OSSEC are: install software, modify ossec.conf to add log monitoring path, define rules, start services and set alarm notifications. Notes include: not relying on a single means, adjusting false positive rules, ensuring log storage, and considering performance overhead.
- Mysql Tutorial . Database 244 2025-08-04 07:44:01
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- How to Configure MySQL for High Availability?
- To achieve high availability of MySQL, it is necessary to combine replication, automatic failover and proxy mechanisms. 1. Configure master-slave or master-master replication, enable binary logs, create replication users and start replication; 2. Use MySQLInnoDBCluster to create clusters and add instances through MySQLShell, and deploy MySQLRouter to achieve automatic failover; 3. Deploy MySQLRouter, HAProxy or ProxySQL as the proxy layer to route traffic through health check; 4. Ensure data consistency, use the InnoDB engine, enable sync_binlog and innodb_flush_log_at_trx_commit, regularly backup and monitor
- Mysql Tutorial . Database 694 2025-08-04 07:08:00
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- Working with HTML Headings and Paragraphs
- Proper use of HTML titles and paragraph tags is essential for page structure. 1. Each page should only use one as the main title, and subsequent sub-titles should be used in sequence to avoid skipping to keep the structure clear; 2. The paragraph must be defined with labels, and it cannot be replaced by new lines or spaces to ensure semantics and style control; 3. The title should be followed closely by explanatory paragraphs to form a logical relationship of "title paragraphs" to improve readability and SEO effect.
- HTML Tutorial . Web Front-end 441 2025-08-04 06:45:01
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- Mastering Lookaheads and Lookbehinds for Complex String Assertions
- Positive assertion (?=...), negative assertion (?!...), positive assertion (??
- PHP Tutorial . Backend Development 138 2025-08-04 06:35:00
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