SPL
PHP 手册

The ArrayObject class

简介

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Class synopsis

ArrayObject
ArrayObject implements IteratorAggregate , Traversable , ArrayAccess , Countable {
/* Methods */
__construct ( mixed $input )
void append ( mixed $newval )
int count ( void )
ArrayIterator getIterator ( void )
bool offsetExists ( mixed $index )
mixed offsetGet ( mixed $index )
void offsetSet ( mixed $index , mixed $newval )
void offsetUnset ( mixed $index )
}

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SPL
PHP 手册