[Solved] What is wrong with this code snippet?$lines = file('data.txt'); echo $lines; — Ans: file() returns an array, echo cannot print array directly | PHP

PHP - File Handling

What is wrong with this code snippet?

$lines = file('data.txt');
echo $lines;

AMissing fopen() before file()

Bfile() requires a second parameter

Cfile() returns a string, not array

Dfile() returns an array, echo cannot print array directly

Step-by-Step Solution

Solution:

Step 1: Understand file() return type
file() returns an array of lines, not a string.
Step 2: Check echo behavior with arrays
echo cannot output arrays directly, causing an error or warning.
Final Answer:
file() returns an array, echo cannot print array directly -> Option D
Quick Check:
echo cannot print arrays directly [OK]

Quick Trick: Use print_r() or loop to display arrays [OK]

Common Mistakes:

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What is wrong with this code snippet?