PHP - File Handling
You want to open a file for reading and writing without truncating it, and create it if it doesn't exist. Which mode should you use?
You want to open a file for reading and writing without truncating it, and create it if it doesn't exist. Which mode should you use?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Analyze each mode
"r+" requires existing file, no create; "w+" truncates file; "a+" reads/writes, creates if missing, no truncation; "x+" creates new only.Step 2: Choose mode matching requirements
"a+" fits: read/write, create if missing, no truncation.Final Answer:
Use "a+" mode for read/write, create, no truncate -> Option BQuick Check:
Read/write + create + no truncate = "a+" [OK]
Quick Trick: "a+" reads/writes, creates file, no erase [OK]
Common Mistakes:
- Choosing "r+" which fails if file missing
- Using "w+" which clears file
- Thinking "x+" opens existing files
Master "File Handling" in PHP
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