PHP File & Date Utilities

<?php

function processImageUpload($fileName, $fileTmp, $fileSize) {
    $allowedTypes = ['jpg', 'jpeg', 'png', 'gif'];
    $ext = strtolower(pathinfo($fileName, PATHINFO_EXTENSION));
    
    if (!in_array($ext, $allowedTypes)) {
        return "Invalid file type.";
    }
    if ($fileSize > 2 * 1024 * 1024) {
        return "File size exceeds limit (2MB).";
    }
    
    $newFilename = uniqid('img_') . '.' . $ext;
    $uploadDir = 'uploads/' . $newFilename;
    
    return "Success! Stored path for PDO insertion: " . $uploadDir;
}

echo processImageUpload("profile.png", "/tmp/php123", 500000) . "\n";
?>

Success! Stored path for PDO insertion: uploads/img_66d4f9e12a.png

<?php

date_default_timezone_set('UTC');

echo "Current Date: " . date('Y-m-d H:i:s') . "\n";
echo "Formatted: " . date('F j, Y, g:i a') . "\n";
echo "Tomorrow: " . date('Y-m-d', strtotime('+1 day')) . "\n";
?>

Current Date: 2026-09-01 22:45:00
Formatted: September 1, 2026, 10:45 pm
Tomorrow: 2026-09-02

<?php

$filename = "sample.txt";
$content = "Hello, PHP File System!\nWritten on: " . date('Y-m-d');

file_put_contents($filename, $content);

$readContent = file_get_contents($filename);
echo "File Content:\n" . $readContent . "\n";
?>

File Content:
Hello, PHP File System!
Written on: 2026-09-01

<?php

$csvData = "Name,Role,City\nAlice,Developer,New York\nBob,Designer,London\nCharlie,Manager,Tokyo";

$lines = explode("\n", trim($csvData));
$header = str_getcsv(array_shift($lines));
$rows = [];

foreach ($lines as $line) {
    $rows[] = array_combine($header, str_getcsv($line));
}

print_r($rows);
?>

Array
(
    [0] => Array
        (
            [Name] => Alice
            [Role] => Developer
            [City] => New York
        )

    [1] => Array
        (
            [Name] => Bob
            [Role] => Designer
            [City] => London
        )

    [2] => Array
        (
            [Name] => Charlie
            [Role] => Manager
            [City] => Tokyo
        )

)

<?php

$filename = "document.report.v2.pdf";

$extension = pathinfo($filename, PATHINFO_EXTENSION);

echo "File: $filename\n";
echo "Extension: $extension\n";
?>

File: document.report.v2.pdf
Extension: pdf

<?php

$content = "DEBUG [2026-09-01]: Test message.\nINFO: User logged in.\nDEBUG [2026-09-01]: Another trace.";

$cleanedContent = preg_replace('/DEBUG.*?\n/s', '', $content);

echo "Cleaned File Content:\n$cleanedContent\n";
?>

Cleaned File Content:
INFO: User logged in.
DEBUG [2026-09-01]: Another trace.