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<?php $strings = array( 'this is a string', 'this is $ a string', 'this is 12 string', 'this is $12.99 string', ); foreach ($strings as $string) { var_dump(strtolower(preg_replace('#[\s+]#', '', preg_replace('#[^a-z0-9\-\s]#', '-', $string)))); }
Output for git.master, git.master_jit, rfc.property-hooks
string(13) "thisisastring" string(14) "thisis-astring" string(14) "thisis12string" string(18) "thisis-12-99string"

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