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

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

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

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

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

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

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

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

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

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