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- How to redirect a user in php
- Useheader("Location:target_page.php");exit;toredirectinPHP,ensuringnooutputprecedesittoavoid"headersalreadysent"errors.
- PHP Tutorial . Backend Development 213 2025-08-23 07:27:02
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- Detailed explanation of the problem of strtotime() returning 1970 date and date comparison
- This article aims to solve the problem of returning a date in 1970 when converting a date string to a timestamp in PHP, and the resulting date comparison error. By analyzing the cause of the problem in detail and combining the createFromFormat method of the DateTime class, a more accurate and reliable date conversion and comparison solution is provided to help developers avoid similar errors and ensure the correctness and stability of the code.
- PHP Tutorial . Backend Development 478 2025-08-23 07:18:01
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- How to use cookies in php
- TousecookiesinPHP,setthemwithsetcookie()beforeoutput,readvia$_COOKIEonsubsequentrequests,anddeletebyexpiringthem;alwaysavoidstoringsensitivedataandusesecure,httponlyflagsforsafety.
- PHP Tutorial . Backend Development 576 2025-08-23 05:46:01
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- Explain the concept of the Unit of Work pattern in Doctrine ORM.
- TheUnitofWorkpatterninDoctrineORMtracksobjectstatechanges,buffersoperationsuntilflush,preventsduplicateentities,andhandlesrelationships.1.ItautomaticallydetectschangestomanagedentitiesandgeneratesoptimizedSQLonflush.2.Itdelaysexecutionofpersist,updat
- PHP Tutorial . Backend Development 932 2025-08-23 04:03:01
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- How to loop through an array in php
- The most common use of foreach to traverse arrays is suitable for indexes and associative arrays, with concise syntax; for loops are suitable for index arrays that need to be controlled, pay attention to performance optimization; array_map() is used for functional programming to process data conversion, while and each() are no longer recommended.
- PHP Tutorial . Backend Development 356 2025-08-23 03:58:02
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- WooCommerce: Automatically set pending orders to be processed and send processing email notifications
- This tutorial aims to solve the problem that the default status of orders for specific payment methods (such as bank transfers, checks, cash on delivery) in WooCommerce is "pending" and guides how to bypass this state, set it directly to "processing", and automatically trigger the sending of "processing" email notifications. By using filter hooks provided by WooCommerce, you can customize order status processes to improve order processing efficiency.
- PHP Tutorial . Backend Development 612 2025-08-22 18:30:01
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- PHP floating point comparison trap: Why is -1 possible less than -1?
- This article discusses the accuracy problems encountered in comparison of floating point numbers in PHP. When var_dump displays -1, the actual value may be slightly less than -1 due to the internal representation of the floating point number, resulting in the unexpected $x < -1 being judged as true. The article will explain the floating-point accuracy limits and provide best practices for safe comparisons using tolerances (epsilon), avoid such logical errors, and ensure the reliability of floating-point operations.
- PHP Tutorial . Backend Development 609 2025-08-22 18:21:00
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- Traps and solutions for PHP floating point number comparison
- This article aims to reveal the possible unexpected situations when comparing floating point numbers in PHP, especially when a floating point number is displayed as -1 by var_dump, but is determined to be less than -1 when comparing. The article will dive into floating point accuracy issues and provide practical ways to avoid such problems, such as using error ranges for comparisons to ensure the correctness and reliability of the program.
- PHP Tutorial . Backend Development 690 2025-08-22 18:18:01
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- Correct way to get data from URL to model class
- This article aims to solve the problem of how to correctly obtain parameters from URLs and pass them to model classes for data filtering in the CodeIgniter framework. Through detailed code examples and step descriptions, help developers understand the usage of $this->input->get(), and how to obtain URL parameters in the controller and pass them to the model for data query.
- PHP Tutorial . Backend Development 625 2025-08-22 18:09:00
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- Verify serialized form data in Laravel 8
- This article aims to solve the problem of verifying form data passed from the front end through the serialize() method in Laravel 8. Focus on how to correctly use Laravel's validators to process such data, including creating validator instances, performing verification, and handling verification errors, and providing sample code to help developers better understand and apply.
- PHP Tutorial . Backend Development 523 2025-08-22 18:06:01
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- How would you prevent SQL Injection, Cross-Site Scripting (XSS), and Cross-Site Request Forgery (CSRF) in a PHP application?
- UsepreparedstatementswithPDOorMySQLitopreventSQLinjectionbyseparatingSQLlogicfromdata.2.PreventXSSbycontextuallyescapingoutputwithhtmlspecialchars()forHTML,json_encode()forJavaScript,andenforcingContent-Security-Policyheaders.3.PreventCSRFbygeneratin
- PHP Tutorial . Backend Development 259 2025-08-22 18:05:01
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- PHP loop to extract the specified ID in a multidimensional array
- This article describes how to use the PHP loop or array_column() function to extract the values ??of a specific key (such as series_id) from a multidimensional array. Through the example code, the implementation of the two methods is shown in detail and their advantages and disadvantages are compared to help developers process multi-dimensional array data efficiently.
- PHP Tutorial . Backend Development 998 2025-08-22 18:03:01
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- What are the security implications of using `serialize()` and `unserialize()` with user input?
- Neveruseunserialize()onuserinputasitcanleadtoPHPObjectInjection,allowingattackerstoexecutearbitrarycodeviamagicmethodslike__wakeup()or__destruct().2.POPchainscanexploitexistingclassestoperformfileinclusion,SQLinjection,orcommandexecutionbymanipulatin
- PHP Tutorial . Backend Development 479 2025-08-22 18:02:01
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- Methods to maintain original image values ??when processing image updates in Laravel
- This article aims to solve the problem of how to ensure that the original image information in the database is not lost when new images are not uploaded when updating data in Laravel applications. Help developers achieve the stability and reliability of image update functions by analyzing common questions and providing sample code.
- PHP Tutorial . Backend Development 190 2025-08-22 18:00:02
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