PHP functions:trim middle: Difference between revisions
(→Why 33?: added thumb, comment and explanation) |
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| Line 36: | Line 36: | ||
} | } | ||
else | else | ||
{ | { // for now, I'm not going to handle the case where $center is longer than $len | ||
return | $num_chars_to_keep = $len - strlen($center); | ||
$num_chars_to_keep_left = ceil($num_chars_to_keep / 2); | |||
$num_chars_to_keep_right = floor($num_chars_to_keep / 2); | |||
$left_string = substr($string,0,$num_chars_to_keep_left); | |||
$right_string = substr($string,-$num_chars_to_keep_right); | |||
return $left_string . $center . $right_string; | |||
} | } | ||
} | } | ||
?> | ?> | ||
</source> | </source> | ||
== Why 33? == | == Why 33? == | ||
Revision as of 22:19, 4 November 2007
Description
This PHP function will reduce long strings to shorter strings, by trimming out the middle. It can be used on any string, but was inspired by the need to reduce URLs that are
http://super.really.long.urls/so/long/they/cannot/really_fit_in_one/field,then
I'd like to reduce the middle of the URL to "[...]"
http://super.really.long.urls[...]/really_fit_in_one/field,then
The field will look a bit nicer and still have useful information.
Status
This code is in pre-epsilon status. Wait a few hours, or contact me if nothing happens in that amount of time Thunder Rabbit
Source
<source lang="php"> <?php //***********************************************// // // this code is freeware // //***********************************************//
/***********************************************/ // echo trim_middle("this is a long string", 10); // thi[...]ng /***********************************************/ function trim_middle($string, $len = 33, $center = "[...]") {
if(strlen($string) <= $len) { return($string); } else { // for now, I'm not going to handle the case where $center is longer than $len $num_chars_to_keep = $len - strlen($center); $num_chars_to_keep_left = ceil($num_chars_to_keep / 2); $num_chars_to_keep_right = floor($num_chars_to_keep / 2); $left_string = substr($string,0,$num_chars_to_keep_left); $right_string = substr($string,-$num_chars_to_keep_right); return $left_string . $center . $right_string; } } ?> </source>
Why 33?
Because the URLs in our test system that *I* made happened to be 33 characters long
