722Part IVConnections

Pages can freely alternate between HTML and JSP, just as in using HTML and PHP. Choose your scripting languagePHP can actually be used with Java in lieu of JSP, though support is much less robust andsubject to change in future releases. Many of the shortcutsavailable to JSP are not availablethrough PHP. For example, many of the standard Java class packages are automatically avail- able as in Java Server Pages, but must be implicitly referenced using PHP Java support. Don t let new syntax and structure similarities lull you into believing that PHP is truly likeJava. The forgiving nature of PHP and the loose treatment of variable typing mean that codemust be treated very differently. Those errors that Java demanded you to fix before it wouldcompile may not show up in PHP until they are in an end user s browser! Guide to this bookAs with the similar sections for C Programmers (Appendix A) and Perl hackers (Appendix B), Table 39-1 labels the chapters of Part I according to how familiar they are likely to be to Javaprogrammers. Table 39-1: Guide to Part I for Java ProgrammersChapterChapter TitleVerdict?Notes1Why PHP and MySQL?NovelThe chapter you need to justify PHPto your boss. 2Server-side Web ScriptingSomewhat familiarImportant if you have not seen Web-scripting languages before. PHP bears many similarities to JavaServer Pages (JSP). 3Getting Started with PHPNovelInstallation, hosting, and so on. 4Adding PHP to HTMLNovel but easy Hello world for PHP. 5Syntax and VariablesSomewhat familiarSome syntactic similarities exist. Some will be unfamiliar, especiallythe way in which variables aretreated. 6Control and FunctionsSomewhat familiarMany of the PHP control structures(if, while, for) work similarly to Java, with important differences, such as functions and variablescoping. Caution44
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