{
   	"require": {
        "chroma-x/string-builder": "~1.0"
    }
}

require_once('path/to/vendor/autoload.php');

use ChromaX\StringBuilder\StringBuilder;

$builder = new StringBuilder('rolod muspi meroL');
$builder
	->reverse()
	->append(' sit amet, consetetur')
	->append(12)
	->append(false)
	->prepend('b')
	->append(true)
	->insert(1, 'qäs')
	->replace(6, 2, 'wertz')
	->setCharAt(4, '2')
	->delete(0, 2)
	->delete(40)
	->deleteCharAt(3);

$result = $builder->build();
fwrite(STDOUT, ' 1. Built string                                          ' . $result . PHP_EOL);

$result = $builder->buildSubstring(5, 2);
fwrite(STDOUT, ' 2. Built substring                                       ' . $result . PHP_EOL);

$result = $builder->buildSubstring(5);
fwrite(STDOUT, ' 3. Built substring                                       ' . $result . PHP_EOL);

$result = $builder->charAt(5);
fwrite(STDOUT, ' 4. Character at position 5                               ' . $result . PHP_EOL);

$result = $builder->firstChar();
fwrite(STDOUT, ' 5. First character                                       ' . $result . PHP_EOL);

$result = $builder->lastChar();
fwrite(STDOUT, ' 6. Last character                                        ' . $result . PHP_EOL);

 1. Built string                                          ä2wertzem ipsum dolor sit amet, conset
 2. Built substring                                       rt
 3. Built substring                                       rtzem ipsum dolor sit amet, conset
 4. Character at position 5                               r
 5. First character                                       ä
 6. Last character                                        t

$result = $builder->length();
fwrite(STDOUT, ' 7. String length                                         ' . $result . PHP_EOL);

$result = $builder->size();
fwrite(STDOUT, ' 8. Number of bytes                                       ' . $result . PHP_EOL);

$result = $builder->indexOf('e');
fwrite(STDOUT, ' 9. First occurence of "e"                                ' . $result . PHP_EOL);

$result = $builder->indexOf('e', 5);
fwrite(STDOUT, '10. First occurence of "e" after position 5               ' . $result . PHP_EOL);

$result = $builder->lastIndexOf('e');
fwrite(STDOUT, '11. Last occurence of "e"                                 ' . $result . PHP_EOL);

$result = $builder->lastIndexOf('e', 5);
fwrite(STDOUT, '12. Last occurence of "e" before the 5th last character   ' . $result . PHP_EOL);

$result = $builder->contains('ipsum');
fwrite(STDOUT, '13. Whether the string contains "ipsum"                   ' . $result . PHP_EOL);

 7. String length                                         38
 8. Number of bytes                                       39
 9. First occurence of "e"                                4
10. First occurence of "e" after position 5               8
11. Last occurence of "e"                                 37
12. Last occurence of "e" before the 5th last character   29
13. Whether the string contains "ipsum"                   <TRUE>

use ChromaX\StringBuilder\StringBuilder;

try {
	$builder = new StringBuilder();

	$result = $builder->indexOf('a');
	fwrite(STDOUT, '1. Result                 ' . $result . PHP_EOL);

	$result = $builder->lastIndexOf('a');
	fwrite(STDOUT, '2. Result                 ' . $result . PHP_EOL);

	$result = $builder->charAt(10);
	fwrite(STDOUT, '3. Result                 ' . $result . PHP_EOL);

} catch (\InvalidArgumentException $exception) {
	fwrite(STDERR, 'Exception with message    ' . $exception->getMessage() . PHP_EOL);
}

1. Result                 <NULL>
2. Result                 <NULL>
Exception with message    Position invalid