Delete a word from a string in mysql row

Am trying to delete a word from a string in my database

The string is $keywords = tech,sms,libya,tax

S开发者_StackOverflowuppose i want to remove libya from the string how do i go about this

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I think for the clarity you might want to explode the string into an array, remove the unwanted element and then reconstruct the string. Like this:

$keywords = 'tech,sms,libya,tax';       // Set String
$keywords = explode(',', $keywords);    // Explode into array
unset($keywords[ array_search('libya', $keywords) ]);   // Unset the array element with value of 'libya'
$keywords = implode(',',$keywords);     // Reconstruct string

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Use MySQL's REPLACE function.