Which PHP functions are disabled?

We disable the following functions due to our enforced PHP security guidelines or for performance reasons:​

• exec()
• passthru()
• shell_exec()
• system()
• proc_open()
• popen()
• pclose()
• show_source()
• posix_kill()
• posix_mkfifo()
• posix_setpgid()
• posix_setsid()
• posix_setuid()
• posix_getpwuid()
• posix_uname()
• dl()
• pcntl_exec()
• proc_close()
• proc_get_status()
• proc_nice()
• proc_terminate()
• symlink()
• link()
• highlight_file()
• apache_child_terminate
• apache_get_modules
• apache_get_version
• apache_getenv
• apache_note
• diskfreespace
• disk_free_space
• opcache_reset
• opcache_compile_file
• opcache_get_configuration
• opcache_get_status
• opcache_invalidate

If for some reason you need access to the above functions, please open a support request, so we can evaluate your case.

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Where to go next

• Override PHP.ini variables if your issue involves configurable PHP settings rather than disabled functions.
• Switch your PHP runtime if compatibility depends on the active PHP version.
• Learn why certain plugins are banned if a plugin relies on restricted or unsupported behavior.
• Enable WordPress debug logs if you need to investigate PHP-related errors.