Windows UAC can restrict write permissions for Apache and MySQL. When the installer starts, you may see a warning about UAC. 2. Choose the Installation Directory
php -d memory_limit=-1 composer.phar install
warn that using PHP 7.4 in 2026 is risky because it no longer receives security patches. While it's perfectly fine for a local "sandbox" where you're just testing code, deploying this version to a live server is highly discouraged. hosting.com A Quick Comparison PHP 7.4 (Legacy) PHP 8.x (Modern) End of Life (EOL) Actively Supported Performance Significantly Faster (JIT Compiler) Compatibility High for older apps Requires code updates Are you trying to xampp 32 bits php 7.4
If you already have a newer XAMPP (like PHP 8.x) and specifically need PHP 7.4 for a project, you can manually swap the PHP folders: Where to find XAMPP for Windows 32-bit with PHP 7.4?
Should display x86 (This confirms it is 32-bit. 64-bit versions display x64 ). Compiler: Should display MSVC15 (Visual C++ 2017) . Step 4: Configuring PHP 7.4 for Optimal Performance Windows UAC can restrict write permissions for Apache
Since November 2022, no official security fixes for PHP 7.4. Known CVEs affecting PHP 7.4 (e.g., CVE-2022-31631, CVE-2023-0568) remain exploitable:
Ensure the installer specifies x86 (which denotes 32-bit) rather than x64 . Download the .exe installer or the .zip portable version. Step 2: Installation Process Should display x86 (This confirms it is 32-bit
If you are running a modern 64‑bit version of Windows, the recommended approach is to use the official 64‑bit XAMPP installer, which fully supports PHP 7.4 and later versions without any compatibility issues. Conversely, if you must maintain a 32‑bit environment—for example, for legacy operating systems like Windows XP (32‑bit) or older hardware—you will need to locate an older 32‑bit XAMPP installer (from the SourceForge archives) and use a matching 32‑bit PHP 7.4 build.
If your live hosting environment utilizes a 32-bit OS running PHP 7.4, your local development stack must match it to avoid code incompatibilities.
Certain legacy PHP applications rely on 32-bit Windows binaries or specific 32-bit PHP extensions (DLLs) that were never ported to 64-bit.
