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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'] ) ) { $path_parts = explode( '/', substr( $parts['path'], 2 ), 2 ); $parts['host'] = $path_parts[0]; if ( isset( $path_parts[1] ) ) { $parts['path'] = "/{$slashless_path}"; } else { unset( $parts['path'] ); } } return $parts; }
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(1) { ["host"]=> string(16) "host.example.com" } array(1) { ["host"]=> string(19) "[::FFFF::127.0.0.1]" }

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