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<?php define( 'FLOAT', ';\s*?q= (1|0 # 1 or 0 (\. # Literal dot ([0-9]{1,2}[1-9]| # One or Two Zeroes followed by 1...9 -OR- [0-9][1-9][0-9]?| # Zero followed by 1...9, followed by an optional 0...9 -OR- [1-9] # 1...9 followed by: ([0-9]{0,2}| # None and up to Two 0...9 -OR- [0-9][1-9]| # 0...9 and then followed by 1...9 -OR- [1-9]{1,2} # 1...9 once and up to three ) )(?![0-9]) )? # All this is optional, and refers to float range (?!\.) )' ); preg_match( sprintf( '@(?<params>%s)@x', FLOAT ), ';q=0.3444', $matches ); var_dump( $matches );
Output for 4.4.6 - 4.4.9, 5.2.2 - 7.4.6
array(0) { }
Output for 5.2.0 - 5.2.1
Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 3 in /in/GZ9MZ on line 23 NULL
Output for 4.3.11 - 4.4.5, 5.0.0 - 5.1.6
Warning: preg_match(): Compilation failed: unrecognized character after (?< at offset 3 in /in/GZ9MZ on line 23 array(0) { }
Output for 4.3.0 - 4.3.10
Warning: Compilation failed: unrecognized character after (?< at offset 3 in /in/GZ9MZ on line 23 array(0) { }