File I/O Patterns Audit

Analyze PHP code for suboptimal or dangerous file I/O patterns.

Detection Patterns

1. Full File Read Into Memory

// CRITICAL: Entire file loaded into memory
$content = file_get_contents('/path/to/large-file.csv'); // 500MB file → OOM!
$lines = file('/path/to/large-file.csv'); // Loads all lines into array!

// CRITICAL: Reading large file to process line by line
$content = file_get_contents($path);
$lines = explode("\n", $content); // Double memory: content + lines array
foreach ($lines as $line) {
    $this->process($line);
}