Belt

Belt 是 PHP 便捷开发工具。

Belt 主要特性：

• 60+ 的有用函数

• 经过完整的测试

• 代码清晰明了，文档齐全

Belt 包括：

• boolean isDate(mixed $value)

• boolean isNumber(mixed $value)

• boolean isString(mixed $value)

• boolean isFunction(mixed $value)

• boolean isEmpty(mixed $value)

• boolean isEqual(mixed $left, mixed $right)

• boolean isBoolean(mixed $value)

• boolean isObject(mixed $value)

• boolean isArray(mixed $value)

• boolean isTraversable(mixed $value)

• boolean isNull(mixed $value)

• boolean has(mixed $object, string $key)

• array keys(mixed $object)

• array values(mixed $object)

• array methods(mixed $object)

• mixed copy(mixed $value)

• mixed extend(mixed $source, mixed $destination)

• mixed apply(mixed $object, Closure $closure)

• mixed defaults(mixed $object, array|mixed $defaults)

• string escape(string $string)

• string id(string $prefix = '')

• mixed with(mixed $value)

• void times(integer $number, Closure $closure)

• mixed cache(Closure $closure)

• mixed wrap(Closure $closure, Closure $wrapper)

• mixed compose(array $closures, array $arguments = array())

• void once(Closure $closure)

• mixed after(integer $number, Closure $closure)

• mixed|array first(array $elements, integer $amount = 1)

• array initial(array $elements, integer $amount = 1)

• array rest(array $elements, integer $index = 1)

• mixed|array last(array $elements, integer $amount = 1)

• array pack(array $elements)

• array flatten(array $elements)

• array range(integer $to, integer $from = 0, integer $step = 1)

• array difference(array $one, array $another)

• array unique(array $elements, Closure $iterator = null)

• array without(array $elements, array $ignore)

• array zip(array $one, array $another)

• integer indexOf(array $elements, mixed $element)

• array intersection(array $one, array $another)

• array union(array $one, array $another)

• void each(array $collection, Closure $iterator)

• array map(array $collection, Closure $iterator)

• array toArray(mixed $value)

• integer|null size(array|Countable $value)

• array shuffle(array $collection)

• boolean any(array $collection, Closure $iterator)

• boolean all(array $collection, Closure $iterator)

• array reject(array $collection, Closure $iterator)

• array pluck(array $collection, string $key)

• boolean contains(array $collection, mixed $value)

• array invoke(array $collection, string $function)

• mixed reduce(array $collection, Closure $iterator, mixed $initial = 0)

• array sortBy(array $collection, Closure $iterator)

• array groupBy(array $collection, Closure $iterator)

• mixed max(array $collection)

• mixed min(array $collection)

简单示例：

use Belt\Belt;
Belt::max([1, 2, 3]) // => 3
Belt::flatten([1, [2, [3]]]) // => [1, 2, 3]
Belt::last([1, 2, 3], 2) // => [2, 3]