| public lastIndexOf ( string $string, string $search, integer $toIndex = null ) : integer | ||
| $string | string | The input string |
| $search | string | The substring to search for |
| $toIndex | integer | The position where the backwards search should start, defaults to the end |
| Результат | integer | The last index of the substring (>=0) or -1 if the substring was not found |
public function lastIndexOf($string, $search, $toIndex = null)
{
$length = mb_strlen($string, 'UTF-8');
if ($toIndex === null) {
$toIndex = $length;
}
$toIndex = max(0, $toIndex);
if ($search === '') {
return min($length, $toIndex);
}
$string = mb_substr($string, 0, $toIndex, 'UTF-8');
$index = mb_strrpos($string, $search, 0, 'UTF-8');
if ($index === false) {
return -1;
}
return (int) $index;
} /**
* @test
* @dataProvider lastIndexOfExamples
*/
public function lastIndexOfWorks($string, $search, $fromIndex, $expected)
{
$helper = new StringHelper();
$result = $helper->lastIndexOf($string, $search, $fromIndex);
$this->assertSame($expected, $result);
}
