mb_strrchr

(PHP 5 >= 5.2.0, PHP 7, PHP 8)

mb_strrchr — Finds the last occurrence of a character in a string within another

Descrizione

mb_strrchr(
    string $haystack,
    string $needle,
    bool $before_needle = false,
    ?string $encoding = null
): string|false

mb_strrchr() finds the last occurrence of needle in haystack and returns the portion of haystack. If needle is not found, it returns false.

Elenco dei parametri

haystack: The string from which to get the last occurrence of needle
needle: The string to find in haystack
before_needle: Determines which portion of haystack this function returns. If set to true, it returns all of haystack from the beginning to the last occurrence of needle. If set to false, it returns all of haystack from the last occurrence of needle to the end,
encoding: Character encoding name to use. If it is omitted, internal character encoding is used.

Valori restituiti

Returns the portion of haystack. or false if needle is not found.

Log delle modifiche

Versione	Descrizione
8.0.0	`needle` now accepts an empty string.
8.0.0	`encoding` is nullable now.

Vedere anche:

strrchr() - Trova l'ultima occorrenza di un carattere in una stringa
mb_strstr() - Finds first occurrence of a string within another
mb_strrichr() - Finds the last occurrence of a character in a string within another, case insensitive

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User Contributed Notes 1 note

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Anonymous ¶

1 year ago

needle: /       
string: o/a/i

if before_needle is 1  then needle is excluded: "o/a"
if before_needle is false  then needle is included:  "/i" 

as code:

$str="o/a/i";
$cs="/";

echo "if before_needle == 1  then needle is excluded"."\n";
$str="o/a/i";
$cs="/";
echo mb_strrchr ($str,$cs,1)."\n";

echo "if before_needle == false  then needle is included"."\n";
$str="o/a/i";
$cs="/";
echo mb_strrchr ($str,$cs,0)."\n";

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