note 58774 modified in function.str-pad by danbrown
| From: | danbrown@php.net | Date: | Sat, 02 Jul 2011 18:55:49 +0000 |
| Subject: | note 58774 modified in function.str-pad by danbrown | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-181191@lists.php.net to get a copy of this message | ||
Hello,
for anyone who needs this, I wrote this extension to str_pad. For details, just look at the
comments.
<?php
$string = 'this is a test';
$oldLen = strlen($string);
$direction = STR_PAD_BOTH;
echo $string.'<br>';
echo str_const_len($string, 101, '#', $direction).'<br>';
echo $string.'<br>';
echo str_const_len($string, $oldLen, '#', $direction).'<br>';
echo $string.'<br><br>'."\n";
/* This function is an extension to str_pad, it manipulates the referenced
string '$str' and stretches or reduces it to the specified length. It
returns the number of characters, that were added or stripped. */
function str_const_len(&$str, $len, $char = ' ', $str_pad_const = STR_PAD_RIGHT) {
$origLen = strlen($str);
if (strlen($str) < $len) { /* stretch string */
$str = str_pad($str, $len, $char, $str_pad_const);
}
else { /* reduce string */
switch ($str_pad_const) {
case STR_PAD_LEFT:
$str = substr($str, (strlen($str) - $len), $len);
break;
case STR_PAD_BOTH:
$shorten = (int) ((strlen($str) - $len) / 2);
$str = substr($str, $shorten, $len);
break;
default:
$str = substr($str, 0, $len);
break;
}
}
return ($len - $origLen);
}
?>
--was--
Hello,
i updated the function in my last post. it should be much more performant now.
<?php
$string = 'this is a test';
$oldLen = strlen($string);
$direction = STR_PAD_BOTH;
echo $string.'<br>';
echo str_const_len($string, 101, '#', $direction).'<br>';
echo $string.'<br>';
echo str_const_len($string, $oldLen, '#', $direction).'<br>';
echo $string.'<br><br>'."\n";
/* This function is an extension to str_pad, it manipulates the referenced
string '$str' and stretches or reduces it to the specified length. It
returns the number of characters, that were added or stripped. */
function str_const_len(&$str, $len, $char = ' ', $str_pad_const = STR_PAD_RIGHT) {
$origLen = strlen($str);
if (strlen($str) < $len) { /* stretch string */
$str = str_pad($str, $len, $char, $str_pad_const);
}
else { /* reduce string */
switch ($str_pad_const) {
case STR_PAD_LEFT:
$str = substr($str, (strlen($str) - $len), $len);
break;
case STR_PAD_BOTH:
$shorten = (int) ((strlen($str) - $len) / 2);
$str = substr($str, $shorten, $len);
break;
default:
$str = substr($str, 0, $len);
break;
}
}
return ($len - $origLen);
}
?>
http://php.net/manual/en/function.str-pad.php