A very brief overview of the usage of PEAR's Console classes, featuring diversionary del.icio.us propaganda.
PEAR provides a number of classes that may prove useful in Command Line based PHP scripts:
Console_Color — color output with ANSI compliant terminals
Console_Getopt — a command line argument parser
Console_ProgressBar — a console progress bar for lengthy operations
Console_Table — easy creation of tabular output
System_Command — a command line execution interface providing argument escaping, handles on both STDOUT and STDERR