PHP Manual

Documentation

PHP function count_chars()

2019-09-11T08:04:03.000Z

Obsah článku

Availability in PHP 4.0

Return information about characters used in a string

Parameters

Parameter	Data type	Default value	Note
`$string`	`string`	not	The examined string.
`$mode`	`int`	null	See return values.

Return values

mixed

Depending on mode
count_chars returns one of the following:
0 - an array with the byte-value as key and the frequency of
every byte as value.
1 - same as 0 but only byte-values with a frequency greater
than zero are listed.
2 - same as 0 but only byte-values with a frequency equal to
zero are listed.
3 - a string containing all unique characters is returned.
4 - a string containing all not used characters is returned.

Other resources

Official documentation of the count-chars function

Jan Barášek

Jan Barášek Více o autorovi

Autor článku pracuje jako seniorní vývojář a software architekt v Praze. Navrhuje a spravuje velké webové aplikace, které znáte a používáte. Od roku 2009 nabral bohaté zkušenosti, které tímto webem předává dál.

Rád vám pomůžu:

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