I am writing a custom command-line application in php and I want to use the default UNIX parsing style for the parameters.
By default, I get the $argv array, which is a representation of all parameters formatted in a line.
Is there somewhere a document which describes how parameters should be interpreted in a UNIX program? For example, am I allowed to attach values using parameter with only one "-"? ("-i=25")
Base Specifications, Issue 7 or IEEE Std 1003.1, 2013 edition is what you are looking for.
Here is a link to the section relating to arguments for command line utilities.