(PHP 4 >= 4.3.0, PHP 5, PHP 7) Close a process opened by

(PHP 4, PHP 5, PHP 7) Execute an external program and display the output

(PHP 4 >= 4.0.3, PHP 5, PHP 7) Escape a string to be used as a shell argument

(PHP 5, PHP 7) Get information about a process opened by

(PHP 4, PHP 5, PHP 7) Execute an external program and display raw output

(PHP 4, PHP 5, PHP 7) Execute command via shell and return the complete output as a string

(PHP 4, PHP 5, PHP 7) Execute an external program

(PHP 5, PHP 7) Kills a process opened by proc_open

(PHP 5, PHP 7) Change the priority of the current process

(PHP 4, PHP 5, PHP 7) Escape shell metacharacters