Found a total of 10000 related content
php function to get user IP address
Article Introduction：To obtain the user's real IP address, multiple HTTP headers need to be checked first. 1. The function checks the headers such as HTTP_CLIENT_IP, HTTP_X_FORWARDED_FOR, and take the first valid IP; 2. Process multiple comma-separated IPs to verify their legitimacy; 3. If all headers are invalid, use REMOTE_ADDR; 4. For CDN environments such as Cloudflare, HTTP_CF_CONNECTING_IP needs to be processed separately; 5. Note that the header information may be forged and cannot be used for security control. This method is suitable for logging and trend analysis, but cannot guarantee 100% accuracy.
2025-07-22
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950
How to Sort Arrays in PHP
Article Introduction：It is always easier to process sorted data to extract specific information, otherwise you have to iterate through each element of the array one by one.
For example, suppose you store the grades of different students in an array or table. If the data are not sorted by the grades obtained, you must check the grades of each student in the class to determine who gets the highest and lowest scores. If the table has been sorted from low to high by grades, you can know the lowest score by simply checking the first student’s grades.
This article will introduce the following PHP array sorting methods:
Sort arrays by value
Sort associative arrays
Sort array elements by value using user-defined functions
Sort array by key
Sort PHP multidimensional arrays
Sort using user-defined functions
Multi-column sorting
Sort by many
2025-03-03
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673
Dave The Diver: How To Catch Spider Crabs
Article Introduction：In Dave The Diver, there are some creatures that are not easy to catch. Or, catch alive that is. The spider crab is one of those very species, making it seem like the only way to bring these crustaceans back up to land is to viciously crack them up w
2025-01-10
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855
Prepare for Interview Like a Pro with Interview Questions CLI
Article Introduction：Prepare for Interview Like a Pro with Interview Questions CLI
What is the Interview Questions CLI?
The Interview Questions CLI is a command-line tool designed for JavaScript learners and developers who want to enhance their interview
2025-01-10
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1485
Soft Deletes in Databases: To Use or Not to Use?
Article Introduction：Soft Deletes: A Question of DesignThe topic of soft deletes, a mechanism that "flags" records as deleted instead of physically removing them, has...
2025-01-10
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1083
Terraria: How To Make A Loom
Article Introduction：There are a lot of crafting stations that you can make in Terraria. This ranges from simple anvils to unique stations meant for one specific type of resource. Early into the game, you'll be able to make your own Loom, which is primarily used to make
2025-01-10
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1365
