find and delete recurring numbers

[JKG]

hello, is there any way that i can take a string like this:

 

99,99,28,99,28,112,78,99,28,112,78,28,112,78,112,78,112,

 

and find and remove the recurring numbers so i am left with this:?

 

99,28,112,78

 

thanks for your time

Joe

[Psycho]

$string = '99,99,28,99,28,112,78,99,28,112,78,28,112,78,112,78,112,';
$string = trim(implode(',', array_unique(explode(',', $string))), ',');

 

Explanation:

 

explode() creates an array with each part separated by a comma as a value (note; there will be an empty value at the end due to the trailing space)

array_unique() removes duplicate values from the array

implode() Converts the array (of only unique values) back into a string separated by commas

trim() removes the trailing comma due to the empty values in the original array

[JKG]

thank you so much, worked perfectly! wasnt aware of array_unique()