Delete duplicate content in string with PHP

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remove duplicate from string in PHP

How to detect and remove duplicate content ignoring recurring "\n"-s with PHP?

I have the following string:

\nrazor989\nalcatraz\nartez\ntajemniczyxd\nmrrazor\nqwertyuiop\npomroczny4\nomgdmg\ngreat_jojek\nmaciekcz242\nkaka2610\nteleskop1\nsupciokawa\nklocek18\nkacpi999\npawel1909\npozbierany\nkelthuzan\nistrim\ngroch\nmario\nalcatraz\n

What is the desired output? For example, do you want an array consisting of ['razor989', 'alcatraz', 'artez', ...]? — John Girata, Jul 29 '12 at 22:15

score 4 · Answer 1 · edited Jan 14 '14 at 00:37

4

Please try

$str = 'your string';
$ar = explode('\n', $str);
$ar = array_unique($ar);
echo implode('\n', $ar); //edited - original code had $arr

edited Jan 14 '14 at 00:37

Dallin

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answered Jul 29 '12 at 22:15

mrok

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It fails hard. $arr is not defined, if changed to "$ar" it does nothing – IlikeITalot Jul 30 '12 at 06:18
Yes in 4th line should be echo implode('\n', $ar); – mrok Jul 30 '12 at 19:11

hohner · Answer 2 · 2012-07-29T22:21:52.960

2

Make it a unique array:

$massiveString = '\nrazor989\nalcatraz\nartez\ntajemniczyxd\nmrrazor\nqwertyuiop\npomroczny4\nomgdmg\ngreat_jojek\nmaciekcz242\nkaka2610\nteleskop1\nsupciokawa\nklocek18\nkacpi999\npawel1909\npozbierany\nkelthuzan\nistrim\ngroch\nmario\nalcatraz\n';

echo implode('\n', array_unique(explode('\n', $massiveString)));

edited Jul 29 '12 at 22:21

answered Jul 29 '12 at 22:16

hohner

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It works but if I put $massiveString = $mystring; it fails, why? – IlikeITalot Jul 30 '12 at 06:22
Replace `$massiveString` with `$mystring` – hohner Jul 30 '12 at 08:26

Delete duplicate content in string with PHP

2 Answers2