How Can I Truncate PHP Strings to the Nearest Word Without Mid-Word Cuts?

Truncating PHP Strings to the Nearest Word

Truncating a string to a specific character limit can result in an unsightly cutoff mid-word. To cater to this need, we explore a PHP code snippet that accurately truncates text at the end of the closest word.

Solution 1: Using Wordwrap

The wordwrap function can split text into lines based on the specified maximum width, breaking at word boundaries. To achieve the desired truncation, we can simply utilize the first line from the split text:

$truncated = substr($string, 0, strpos(wordwrap($string, $limit), "\n"));

Solution 2: Token-Based Truncation

However, solution 1 has a limitation: it prematurely cuts the text if a newline character appears before the cutoff point. To mitigate this, we can implement token-based truncation:

function tokenTruncate($string, $limit) {
  $tokens = preg_split('/([\s\n\r]+)/u', $string, null, PREG_SPLIT_DELIM_CAPTURE);

  $length = 0;
  $lastToken = 0;
  while ($length <= $limit && $lastToken < count($tokens)) {
    $length += strlen($tokens[$lastToken]);
    $lastToken++;
  }

  return implode(array_slice($tokens, 0, $lastToken));
}

Conclusion

By implementing these solutions, you can effectively truncate PHP strings at the nearest word, ensuring a clean and meaningful display.

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