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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('#[^a-z0-9]#', '', preg_replace('#[\s+]#', '-', $$string)))); }
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $this is a string in /in/hqMoi on line 9 Deprecated: preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /in/hqMoi on line 9 string(0) "" Warning: Undefined variable $this is $ a string in /in/hqMoi on line 9 Deprecated: preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /in/hqMoi on line 9 string(0) "" Warning: Undefined variable $this is 12 string in /in/hqMoi on line 9 Deprecated: preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /in/hqMoi on line 9 string(0) "" Warning: Undefined variable $this is $12.99 string in /in/hqMoi on line 9 Deprecated: preg_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /in/hqMoi on line 9 string(0) ""

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