如何检查字符串php中是否重复了一个单词[关闭]

Question

I have a database that have multiple fields. i've to display one of its field in in html table. i can do it easily. but the problem is that the field i want to show may contain repeated words in a row. for eg

• john;mike;john
• john
• mike;mike;mike

now what i want to do is that i have to trim repeated words i.e if a word is more than once in a row so it should be displayed only once. e.g above will be

• john;mike
• john
• mike

i.e i don't want to show repetition when displaying record in html table. i want to make it dynamic i.e not just for 5 to 6 word. but to condemn repetition even if there thousands of records.

considering whole value of a row as a string how could i remove this using php ..

Thanks for your support in advance..

Answer 1

$variable="mike;john;mike";

$each=explode(';',$variable);
//print_r($each);
$new=array_unique($each);

echo implode(';',$new); //mike;john