PHP - File Handling
You want to open a file in PHP to read and write without truncating it, and create it if it doesn't exist. Which mode should you use?
You want to open a file in PHP to read and write without truncating it, and create it if it doesn't exist. Which mode should you use?
hard📝 Application Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Understand each mode's behavior
r+reads/writes but fails if file missing;w+truncates file;a+reads/writes, creates if missing, appends writes;x+creates new file only.Step 2: Match requirements
We want read/write, no truncation, and create if missing.a+fits all: it opens for reading and appending, creates file if missing, and does not truncate.Final Answer:
a+ -> Option BQuick Check:
Read/write + create + no truncate = a+ [OK]
Quick Trick: Use 'a+' to read/write and create without truncating [OK]
Common Mistakes:
- Choosing 'r+' which fails if file missing
- Choosing 'w+' which truncates file
- Confusing 'x+' which fails if file exists
Master "File Handling" in PHP
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