What do 4, 2, and 1 stand for in chmod?

In Unix file systems, 4 represents Read (r) permission, 2 represents Write (w) permission, and 1 represents Execute (x) permission. Adding them together creates the permission digit (e.g., 4+2+1 = 7 for full access).

Why is chmod 777 dangerous?

777 gives all three groups (Owner, Group, and Others) full permission to read, write, and execute the file. On a web server, this allows untrusted users or processes to modify or inject malicious code.

What are the standard permissions for WordPress or PHP files?

Standard web permissions are typically 755 for folders/directories (rwxr-xr-x) and 644 for individual files (rw-r--r--).

Chmod Permissions Calculator | Convert Octal to Symbolic (rwx)