PHP MYSQL search for postcode using LIKE -

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i have query searches postcode using like. postcode fine if puts full postcode e.g. sw14 4np. if put in sw1 return sw1+ results. how can make if put sw1, display sw1 postcode , not sw11, sw14 etc.

my query is:

select postcode data postcode '$search%'

the database postcodes stored sw14 4np etc space.

use regular expression based pattern matching:

where postcode rlike '^$search( ?[0-9][a-z]{2})?'

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