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<?php $url = '//host.example.com'; var_dump( wp_parse_url( $url ) ); $url = '//[::FFFF::127.0.0.1]'; var_dump( wp_parse_url( $url ) ); function wp_parse_url( $url ) { $parts = @parse_url( $url ); if ( ! $parts ) { // < PHP 5.4.7 compat, trouble with relative paths including a scheme break in the path if ( '/' == $url[0] && false !== strpos( $url, '://' ) ) { // Since we know it's a relative path, prefix with a scheme/host placeholder and try again if ( ! $parts = @parse_url( 'placeholder://placeholder' . $url ) ) { return $parts; } // Remove the placeholder values unset( $parts['scheme'], $parts['host'] ); } else { return $parts; } } // < PHP 5.4.7 compat, doesn't detect schemeless URL's host field if ( '//' == substr( $url, 0, 2 ) && ! isset( $parts['host'] ) ) { list( $parts['host'], $slashless_path ) = explode( '/', substr( $parts['path'], 2 ), 2 ); $parts['path'] = "/{$slashless_path}"; } return $parts; }

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