PHP method to replace the middle character of a string with an ellipsis, string ellipsis_PHP tutorial

How to replace the middle character of a string with an ellipsis in php. String ellipsis

This article describes the method of replacing the middle character of a string with an ellipse in php. Share it with everyone for your reference. The specific analysis is as follows:

For a long string, if you only want the user to see the beginning and end of the content and hide the middle content, you can use this php function, which can specify the number of middle strings to be hidden

/**
 * Reduce a string by the middle, keeps whole words together
 *
 * @param string $string
 * @param int $max (default 50)
 * @param string $replacement (default [...])
 * @return string
 * @author david at ethinkn dot com
 * @author loic at xhtml dot ne
 * @author arne dot hartherz at gmx dot net
 */
function strMiddleReduceWordSensitive($string,$max=50,$rep='[...]'){
  $strlen = strlen($string);
  if ($strlen <= $max)
    return $string;
  $lengthtokeep = $max - strlen($rep);
  $start = 0;
  $end = 0;
  if (($lengthtokeep % 2) == 0) {
    $start = $lengthtokeep / 2;
    $end = $start;
  } else {
    $start = intval($lengthtokeep / 2);
    $end = $start + 1;
  }
  $i = $start;
  $tmp_string = $string;
  while ($i < $strlen) {
    if (isset($tmp_string[$i]) and $tmp_string[$i] == ' ') {
      $tmp_string = substr($tmp_string, 0, $i) . $rep;
      $return = $tmp_string;
    }
    $i++;
  }
  $i = $end;
  $tmp_string = strrev ($string);
  while ($i < $strlen) {
    if (isset($tmp_string[$i]) and $tmp_string[$i] == ' ') {
      $tmp_string = substr($tmp_string, 0, $i);
      $return .= strrev ($tmp_string);
    }
    $i++;
  }
  return $return;
  return substr($string, 0, $start).$rep.substr($string, - $end);
}

Demo example:

// example:
$text = 'This is a very long test sentence, bla foo bar nothing';
print strMiddleReduceWordSensitive ($text, 30) . "\n";
// Returns: This is a very[...]foo bar nothing (~ 30 chrs)
print strMiddleReduceWordSensitive ($text, 30, '...') . "\n";
// Returns: This is a very...foo bar nothing (~ 30 chrs)

I hope this article will be helpful to everyone’s PHP programming design.

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