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Informations about the package args

Args

A library to make argument checking less of a chore.

Missing type hinting

PHP will not allow type hinting scalar values in functions and methods arguments forcing cycles like this to be added in each function body:

if (!is_string($s)){
    throw ...
}
if(strlen($s) > 20 || strlen($s) < 10){
    throw ...
}
if(preg_match($this->name_pattern, $s) === false){
    throw ...
}

The library, still a work in progress aims at making argument check more granular, tested and DRYer ') by introducing a fluent interface.
The check above could become

Arg::_($s)->is_string()->length(10, 20)->match($this->name_pattern);

Some array-related functions are there too:

Arg::_($a)->count(6, 10)->contains('value1', 'value2')->has_key('key_one');

Each method will throw an Exception if the condition is not satisfied. In the array example if array is ['some', 23] then an exception will be thrown with the message:

Array must contain at least 6 elements!

Installation

Download the class and add it to your project or use Composer like

require: {
    "lucatume/args": "~0.1"
}

Methods

Each call to the class should begin using the static method _() and passing it the value to check and, optionally, the name that value will be referred to in exceptions

Arg::_($value, 'amount');

To actually check the argument against a condition use the assert() method

Arg::_($value)->assert($value > 13);

While that's the base this syntax is best used in special cases the clas doesn't cover and the convenient methods provided by the class should be used.
Each method is defined in a positive logic: nothing will happen if the argument matches the expectation, an exception will be thrown otherwise.

Scalar methods

If an argument is a scalar then additional check methods are available:

String methods

If an argument is a string then additional methods are available

Array methods

If an argument is an array then additional methods are available

Object methods


All versions of args with dependencies

PHP Build Version
Package Version
Requires xrstf/composer-php52 Version 1.*
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