public function AbstractStringWrapper::wordWrap in Zircon Profile 8

Same name and namespace in other branches

1. 8.0 vendor/zendframework/zend-stdlib/src/StringWrapper/AbstractStringWrapper.php \Zend\Stdlib\StringWrapper\AbstractStringWrapper::wordWrap()

Wraps a string to a given number of characters

Parameters

string $string:

int $width:

string $break:

bool $cut:

Return value

string|false

Overrides StringWrapperInterface::wordWrap

File

vendor/zendframework/zend-stdlib/src/StringWrapper/AbstractStringWrapper.php, line 147

Class

AbstractStringWrapper

Namespace

Zend\Stdlib\StringWrapper

Code

public function wordWrap($string, $width = 75, $break = "\n", $cut = false) {
  $string = (string) $string;
  if ($string === '') {
    return '';
  }
  $break = (string) $break;
  if ($break === '') {
    throw new Exception\InvalidArgumentException('Break string cannot be empty');
  }
  $width = (int) $width;
  if ($width === 0 && $cut) {
    throw new Exception\InvalidArgumentException('Cannot force cut when width is zero');
  }
  if (StringUtils::isSingleByteEncoding($this
    ->getEncoding())) {
    return wordwrap($string, $width, $break, $cut);
  }
  $stringWidth = $this
    ->strlen($string);
  $breakWidth = $this
    ->strlen($break);
  $result = '';
  $lastStart = $lastSpace = 0;
  for ($current = 0; $current < $stringWidth; $current++) {
    $char = $this
      ->substr($string, $current, 1);
    $possibleBreak = $char;
    if ($breakWidth !== 1) {
      $possibleBreak = $this
        ->substr($string, $current, $breakWidth);
    }
    if ($possibleBreak === $break) {
      $result .= $this
        ->substr($string, $lastStart, $current - $lastStart + $breakWidth);
      $current += $breakWidth - 1;
      $lastStart = $lastSpace = $current + 1;
      continue;
    }
    if ($char === ' ') {
      if ($current - $lastStart >= $width) {
        $result .= $this
          ->substr($string, $lastStart, $current - $lastStart) . $break;
        $lastStart = $current + 1;
      }
      $lastSpace = $current;
      continue;
    }
    if ($current - $lastStart >= $width && $cut && $lastStart >= $lastSpace) {
      $result .= $this
        ->substr($string, $lastStart, $current - $lastStart) . $break;
      $lastStart = $lastSpace = $current;
      continue;
    }
    if ($current - $lastStart >= $width && $lastStart < $lastSpace) {
      $result .= $this
        ->substr($string, $lastStart, $lastSpace - $lastStart) . $break;
      $lastStart = $lastSpace = $lastSpace + 1;
      continue;
    }
  }
  if ($lastStart !== $current) {
    $result .= $this
      ->substr($string, $lastStart, $current - $lastStart);
  }
  return $result;
}