- connection_aborted() – It checks whether the client has disconnected.
- connection_status() – It returns the current connection status
- connection_timeout() – It checks if the script timed out
- constant() – It returns the value of a constant
- define() – It defines a constant
- defined() – It checks whether a given named constant exists
- die() – Its an alias of the exit() and prints a message and exits the current script
- eval() – It evaluates a string as PHP code.
- exit() – It output a message and terminate the current script
- get_browser() – It returns the capabilities of the user’s browser
- __halt_compiler() – It halts the compiler execution
- highlight_file() – It outputs a file with the PHP syntax highlighted
- highlight_string() – It outputs a string with the PHP syntax highlighted
- ignore_user_abort() – It sets whether a remote client can abort the running of a script
- pack() – It packs data into a binary string
- php_check_syntax() – It heck the PHP syntax of the specified file
- php_strip_whitespace() – It returns the source code of a file with PHP comments and whitespace removed
- show_source() – Its an alias of highlight_file() and outputs a file with the PHP syntax highlighted
- sleep() – It delays execution
- sys_getloadavg() – It returns system load average
- time_nanosleep() – It delay for a number of seconds and nanoseconds
- time_sleep_until() – It makes the script sleep until the specified time
- uniqid() – It generates a unique ID
- unpack() – It unpacks data from binary string
- usleep() – It delays execution in microseconds