How to trim string start from back until dash?

Question

i would like to know, if we can trim below string start from back until dash ?

String

doc/20-05-2013_08-44-19_Rusly_60_sample1.pdf
doc/20-05-2013_08-44-19_Rusly_60_logo.png

Output

sample1.pdf
logo.png

Will the format always be doc/{{filename}}? if so you could use explode() e.g. $parts = explode('_', $string); echo $parts[count($parts)]; — ncremins, May 20 '13 at 09:09
yes always with doc.. i just want show the short file name sample1.pdf to user. — rusly, May 20 '13 at 09:10
It is ok until the second part has no dash. Filenames may contain dashes. — Andrey Volk, May 20 '13 at 09:47

score 4 · Accepted Answer · answered May 20 '13 at 09:13

4

Use this

$str = "doc/20-05-2013_08-44-19_Rusly_60_sample1.pdf";
echo substr($str,strrpos($str,'_'));

answered May 20 '13 at 09:13

Sudz

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score 3 · Answer 2 · answered May 20 '13 at 09:10

3

Simply explode string and get last element from array like

$arr = explode("_", 'doc/20-05-2013_08-44-19_Rusly_60_sample1.pdf');
   echo end($arr);

answered May 20 '13 at 09:10

Mahmood Rehman

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Does it work for `doc/20-05-2013_08-44-19_Rusly_60_nice_file.pdf`? – Andrey Volk May 20 '13 at 09:37
Very elegant solution. – Casimir et Hippolyte May 20 '13 at 09:38

score 2 · Answer 3 · answered May 20 '13 at 09:10

2

You could solve it like this:

echo array_pop(explode('_', $string));

answered May 20 '13 at 09:10

silkfire

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score 1 · Answer 4 · answered May 20 '13 at 09:09

1

try this

$result = preg_replace('/(?m)^.+_(.+)$/', '$1', $subject);

answered May 20 '13 at 09:09

Cylian

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score 1 · Answer 5 · answered May 20 '13 at 09:10

1

Try strchr

$str = "doc/20-05-2013_08-44-19_Rusly_60_sample1.pdf";

echo substr(strrchr($str, "_"), 1);

answered May 20 '13 at 09:10

chandresh_cool

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score 0 · Answer 6 · answered May 20 '13 at 09:09

0

locate the position of the dash with strrpos
use substr($roginal, $dashposition + 1)

answered May 20 '13 at 09:09

Peter Kiss

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score 0 · Answer 7 · answered May 20 '13 at 09:09

Use the following functions: http://php.net/manual/en/function.strrpos.php http://php.net/manual/en/function.substr.php

strrpos looks when the last occurence of a charachter is (example it is _) When no occurence is found it returns false. Then with substr with get the string

Then the code will be

$start = (strrpos('_', $string) !== false) ? strrpos($string) : 0;
$new_string = substr($string, $start);

score 0 · Answer 8 · answered May 20 '13 at 09:09

0

you could do:

$value = array_pop( explode( "_", $yourVar) );
echo $value;

answered May 20 '13 at 09:09

Sudhir Bastakoti

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Andrey Volk · Answer 9 · 2013-05-20T09:32:05.823

0

Should we calculate a position of the latest dash?
What if doc/20-05-2013_08-44-19_Rusly_60_ prefix has constant 33 length?
May result be samp_le1.pdf?

echo substr( $str, 33 );

edited May 20 '13 at 09:32

answered May 20 '13 at 09:19

Andrey Volk

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It is constant, and if Rusly_60 is constant too, than 33 is a position of the "last" dash. – Andrey Volk May 20 '13 at 09:26

How to trim string start from back until dash?

9 Answers9