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I have a text file in the form of Name@Phone\n. I put the data into an array with explode(). How can I remove duplicate lines (values) based on Phone only? I want to avoid

Eddie@999-999-999
Ed@999-999-999

I want to make this unique based on the Phone.

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1  
do you need to keep the "Ed" and "Eddie" information? – rdlowrey Dec 7 '11 at 20:51
No just to keep one of the records is OK. – All Dec 7 '11 at 20:59

3 Answers

up vote 4 down vote accepted 
<?php
$result = array();
foreach($dataset as $input):
    $parts = explode('@', $input);
    $result[$parts[1]] = $parts[0];
endforeach;
$result = array_flip($result);
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+1 clever idea. – AlienWebguy Dec 7 '11 at 20:53
+1 agree with that. – rdlowrey Dec 7 '11 at 20:58
This also worked well for trying to find the newest directory for each day where there are multiple directorys with YYYY-MM-DD-HH-MM-SS as the format. I used $directories[$directory] = substr($directory,0,10); so that the date would end up being the key and the largest numbered time is the last to be created. – doubleJ Oct 2 '12 at 18:30
up vote 2 down vote

If you don't care about the names and just want a list of unique numbers you can replace all characters in the listings that aren't numbers or dashes then do an array_unique():

$arr = array(
  'Eddie@999-999-999',
  'Ed@999-999-999'
);

$arr = preg_replace('/[^\d\-]/', '', $arr);
$arr = array_unique($arr);

print_r($arr);

If you know the numbers are always in that format (name@number) then the response from @Kenaniah works well.

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up vote 1 down vote

Use:

$result = array();
foreach($arrayData as $data){
    $uniqueKey = strstr($data, '@');//@999-999-999
    $result[$uniqueKey] = $data;
}

var_dump( $result );
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