(PHP 8)
str_ends_with — Checks if a string ends with a given substring
$haystack, string $needle): bool
Performs a case-sensitive check indicating if
haystack ends with needle.
haystackThe string to search in.
needle
The substring to search for in the haystack.
Returns true if haystack ends with
needle, false otherwise.
Beispiel #1 Using the empty string ''
<?php
if (str_ends_with('abc', '')) {
echo "All strings end with the empty string";
}
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
All strings end with the empty string
Beispiel #2 Showing case-sensitivity
<?php
$string = 'The lazy fox jumped over the fence';
if (str_ends_with($string, 'fence')) {
echo "The string ends with 'fence'\n";
}
if (str_ends_with($string, 'Fence')) {
echo 'The string ends with "Fence"';
} else {
echo '"Fence" was not found because the case does not match';
}
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
The string ends with 'fence' "Fence" was not found because the case does not match
Hinweis: Diese Funktion ist binärsicher.
this is the fastest php7-implementation i can think of, it should be faster than javalc6 and Reinder's implementations, as this one doesn't create new strings (but theirs does)
<?php
if (! function_exists('str_ends_with')) {
function str_ends_with(string $haystack, string $needle): bool
{
$needle_len = strlen($needle);
return ($needle_len === 0 || 0 === substr_compare($haystack, $needle, - $needle_len));
}
}
?>
In PHP7 you may want to use:
if (!function_exists('str_ends_with')) {
function str_ends_with($str, $end) {
return (@substr_compare($str, $end, -strlen($end))==0);
}
}
AFAIK that is binary safe and doesn't need additional checks.
Wordpress 5.9 RC3 does it this way:
<?php
if ( ! function_exists( 'str_ends_with' ) ) {
function str_ends_with( $haystack, $needle ) {
if ( '' === $haystack && '' !== $needle ) {
return false;
}
$len = strlen( $needle );
return 0 === substr_compare( $haystack, $needle, -$len, $len );
}
}
?>
I suppose the compiler optimizes for the fact that `substr_compare()` is only being used for equality, not comparison ( <0, >0 ).
better real world example i ran into
if (str_ends_with($name, '-')) {
$url = "https://www.website.com/authors/{$name}quotes";
} else {
$url = "https://www.website.com/authors/{$name}-quotes";
}
