Y<\/span>ou may have a preferred style for coding. A big function can be compressed with a single line of code. When it comes to develop the code for other people and sell them, it is recommended to make easy-to-realize codes. If the code is simple enough, universal standards are there to help anyone performing code with the same style. All the theme marketplaces and download centers need coding with standards. There are four markup and programming languages for developing wordpress themes<\/strong> such as:<\/p>\n HTML<\/p>\n JavaScript<\/p>\n CSS<\/p>\n PHP<\/p>\n<\/div>\n Let us have a look at them:<\/p>\n HTML Standards<\/strong><\/p>\n Rules to write standard HTML code:<\/p>\n Code should be validated with w3c<\/p>\n Care should be given to self closing elements. A space should be given to end the element. A greater than and a slash sign should also be used.<\/p>\n Attribute values should be written in lowercase.<\/p>\n Attribute values should be wrapped with quotes. Both double and single quotes are acceptable.<\/p>\n There should be readable and logical indentation<\/p>\n<\/div>\n CSS Standards<\/strong><\/p>\n Following are the simple rules of appropriate coding in CSS:<\/p>\n Tabs should be used for indentation of properties.<\/p>\n Selectors can be grouped but each selector should have its individual line to ensure readability.<\/p>\n Class name and id selectors should be written in lower class. Words should be separated using a hyphen.<\/p>\n No over-qualifying div.column is not included any meaning while using just .column and others.<\/p>\n<\/div>\n JavaScript Standards<\/strong><\/p>\n As javascript becomes important, it is recommended to know the rules and standards:<\/p>\n It is not possible to open and close braces in the same line.<\/p>\n Preference should be given to single quotes compared to double quotes.<\/p>\n Whitespaces can be used in the code. They cannot be used in the blank lines. Whitespaces ensures better readability and not only for space and others.<\/p>\n<\/div>\n PHP Standards<\/strong><\/p>\n This is more tough part to be accomplished. A lot of rules are there to remember:<\/p>\n