Basically that’s the question – I wonder if set_transient() overwrites/updates a transient option with the same key?
Does set_transient() overwrite/update transient option with same key?
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Yes, key (prefixed with string identifying it as transient) is used as option name when value is inserted in database.
Maybe, but in my case set_transient() has failed when re-used without delete_transient() first. For some time I thought the problem was that the array I was saving as a transient was too large but that wasn’t it. I recommend that you delete the transient first if you’re having a problem.
I would concur with Jorge on the deletion first – I was having issues with
set_transienttrying to “overwrite” the same transient. Theset_transientfunction was updating it, but the return value was false, not true.A call to
delete_transientwith its name just beforeset_transientsolved my issues andset_transientwould always return true.