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SolrDisMaxQuery::setQueryPhraseSlop — specifies the amount of slop permitted on phrase queries explicitly included in the user's query string (qf parameter)
The Query Phrase Slop is the amount of slop permitted on phrase queries explicitly included in the user's query string with the qf parameter.
slop refers to the number of positions one token needs to be moved in relation to another token in order to match a phrase specified in a query.
Amount of slop
Example #1 SolrDisMaxQuery::setQueryPhraseSlop() example
$dismaxQuery = new SolrDisMaxQuery();
The above example will output something similar to: