PHP funkce count_chars()
Return information about characters used in a string
Dostupnost ve verzích: PHP 4.0
Return information about characters used in a string
Parametry
| Parametr | Datový typ | Výchozí hodnota | Poznámka |
|---|---|---|---|
$string |
string |
není | The examined string. |
$mode |
int |
null | See return values. |
Návratové hodnoty
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.
Další zdroje
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