Completeness: Ensure all is_* functions are implemented about validation

[henriquemoody]

I have created a branch "files" (see #102) and I'm working on this branch to implements all the is_* about files:

For now, we have:

• is_dir();
• is_file();
• file_exists();
• is_link();
• is_readable();
• is_uploaded_file();
• is_writeable();

I have to do:

• is_executable();

I hope today I can finish this.

[nickl-]

Could you link to documentation please?

This issue was specifically in reference to Variable handling Functions

Listed here with tics for those which are correctly implemented, a another name where name deviation apply or if another method is used to accomplish the same. If nothing was mentioned this may not be implemented yet.

• empty — Determine whether a variable is empty
  NotEmpty
• is_array — Finds whether a variable is an array
  Arr
• ✓ is_bool — Finds out whether a variable is a boolean
• is_callable — Verify that the contents of a variable can be called as a function
  Callback
• ✓ is_float — Finds whether the type of a variable is float
• is_double — Alias of is_float
• is_real — Alias of is_float
• is_int — Find whether the type of a variable is integer
  Int uses is_numeric
• is_integer — Alias of is_int
• is_long — Alias of is_int
• is_null — Finds whether a variable is NULL
  NullValue
• ✓ is_numeric — Finds whether a variable is a number or a numeric string
• ✓ is_object — Finds whether a variable is an object
• is_resource — Finds whether a variable is a resource
• is_scalar — Finds whether a variable is a scalar
• ✓ is_string — Find whether the type of a variable is string
• isset — Determine if a variable is set and is not NULL
  NotEmpty

There exists several discrepancies where different naming was used or the correct name but alternative methods were used to accomplish the same.

The complete list of is* functions would probably looks like this as of date:

• is_a
• ✓ is_array
• ✓ is_bool
• ✓ is_callable
• ✓ is_dir
• ✓ is_double
• ✓ is_executable
• ✓ is_file
• is_finite
• ✓ is_float
• is_infinite
• is_int
• is_integer
• ✓ is_link
• is_long
• is_nan
• is_null
• is_numeric
• is_object
• ✓ is_readable
• ✓ is_real
• is_resource
• is_scalar
• is_soap_fault
• ✓ is_string
• is_subclass_of
• ✓ is_uploaded_file
• ✓ is_writable
• ✓ is_writeable

[leonnleite]

this issue have 10 months, it's up to date? I'll get some

[nickl-]

@leonnleite Still up for grabs. If you can fill in the blanks for us that would be awesome!

Shout if you need a hand with anything...

Have fun!