| public indexOf ( string $string, string $search, integer $fromIndex = null ) : integer | ||
| $string | string | The input string |
| $search | string | The substring to search for |
| $fromIndex | integer | The index where the search should start, defaults to the beginning |
| Результат | integer | The index of the substring (>= 0) or -1 if the substring was not found |
public function indexOf($string, $search, $fromIndex = null)
{
$fromIndex = max(0, $fromIndex);
if ($search === '') {
return min(mb_strlen($string, 'UTF-8'), $fromIndex);
}
$index = mb_strpos($string, $search, $fromIndex, 'UTF-8');
if ($index === false) {
return -1;
}
return (int) $index;
} /**
* @test
* @dataProvider indexOfExamples
*/
public function indexOfWorks($string, $search, $fromIndex, $expected)
{
$helper = new StringHelper();
$result = $helper->indexOf($string, $search, $fromIndex);
$this->assertSame($expected, $result);
}
