public function testEndsWith()
{
$this->assertTrue(StrUtil::endsWith('foobar', 'bar'), 'foobar ends with bar');
$this->assertTrue(StrUtil::endsWith('foobar', ''), 'foobar ends with empty string');
$this->assertTrue(StrUtil::endsWith('', ''), 'empty string ends with empty string');
$this->assertFalse(StrUtil::endsWith('foobar', 'baz'), 'foobar does not end with baz');
$this->assertFalse(StrUtil::endsWith('foobar', 'foo'), 'foobar does not end with foo');
$this->assertFalse(StrUtil::endsWith('foobar', 'xfoobar'), 'foobar does not end with xfoobar');
}
/**
* Joins two or more path components.
* If joining more than two path components, the result is
* the same as calling two-argument joinPath successively.
* Moreover, this function is associative, i.e.
* joinPath('a','b','c') has the same effect as
* joinPath(joinPath('a', 'b'), 'c') or joinPath('a', joinPath('b', 'c'))
*
* Path components of zero length are ignored
*
* @param string $a first path component
* @param string $b second path component
* @param string ... any other path components to join
* @returns string all the paths joined using a directory separator
*/
public static function joinPath($a, $b)
{
$args = func_get_args();
$num_args = count($args);
$shouldAddDS = true;
// start with $a, omit trailing directory separator
if ($a == DIRECTORY_SEPARATOR || $a == '') {
$shouldAddDS = false;
$path = $a;
} else {
if (StrUtil::endsWith($a, DIRECTORY_SEPARATOR)) {
$path = substr($a, 0, strlen($a) - 1);
} else {
$path = $a;
}
}
// add other components
for ($i = 1; $i < $num_args; $i++) {
$part = $args[$i];
// DIRECTORY_SEPARATOR or empty string is a special case
if ($part == DIRECTORY_SEPARATOR) {
continue;
}
// first extract range of part without leading or trailing DS
if (StrUtil::startsWith($part, DIRECTORY_SEPARATOR)) {
$start = 1;
} else {
$start = 0;
}
if (StrUtil::endsWith($part, DIRECTORY_SEPARATOR)) {
$end = strlen($part) - 1;
} else {
$end = strlen($part);
}
// append a path component
if ($shouldAddDS) {
$path .= DIRECTORY_SEPARATOR;
}
$shouldAddDS = true;
$path .= substr($part, $start, $end);
}
return $path;
}
