By default, auto commit is on for a connection. Disabling auto commit is equivalent with starting a transaction.

This function returns an array of the entire command line history. The elements are indexed by integers starting at zero.

Scans a, starting with bit start, towards more significant bits, until the first clear bit is found. Returns the index of the found bit.

Scans a, starting with bit start, towards more significant bits, until the first set bit is found. Returns the index of the found bit.

Elements of an array field can be retrieved by passing the optional which, starting at zero. For non array fields the optional parameter which will be ignored.

If the file is opened for reading, this function is emulated but can be extremely slow. If the file is opened for writing, only forward seeks are supported gzseek then compresses a sequence of zeroes up to the new starting position.

ע This was added in PHP 4.4.0. In earlier version you need to use with db3 DIR with DIR being the path to db4 librarie. It is not possible to use db versions starting from 4.1 with PHP prior to version 4.3.0.

ע Up to PHP 4.3.0 you are able to add both db2 and db3 handler but only one of them can be used internally. That means that you cannot have both file formats. Starting with PHP 4.4.0 there is a configuration check avoid such missconfigurations.

Soundex keys have the property that words pronounced similarly produce the same soundex key, and can thus be used to simplify searches in databases where you know the pronunciation but not the spelling. This soundex function returns a string 4 characters long, starting with a letter.

When a pattern is going to be used several times, it is worth spending more time analyzing it in order to speed up the time taken for matching. If this modifier is set, then this extra analysis is performed. At present, studying a pattern is useful only for non anchored patterns that do not have a single fixed starting character.