#PHP IF ELSE WITH HTML CODE#
It doesn't matter if the code looks like valid PHP code. then visited the page in your browser, you would see this HTML output: echo 1 + 2 9 Since this is a PHP help forum, we usually are talking about snippets of PHP code and so it is assumed that you are working inside a It is often better to be explicit with your conditions, and I usually am, but strlen() checks are usually safe to use in this shortcut technique. if the result of that is 1 or more (meaning $variable is not blank) then PHP will treat that positive number the same as a true value. (Some people use the function empty() but that's a bad function for beginners to use for a variety of reasons) It will either be 0 if the string is blank, or a positive number if the string is not blank. With that in mind, the strlen() returns the length of a string. So PHP has "truth-y" and "false-y" values because it will try to convert non-boolean values to booleans using some basic rules.įor example, the number 0 will convert to false while numbers greater than 0 will convert to true.
It does the same thing when you try to use a non-boolean value as if it were a boolean: if(1) But PHP tries to figure out what you were trying to do and since you were trying to use $x as if it was a number, it will try to temporarily convert it to a number and then it adds the two numbers together. A string isn't a numerical data type, even if it seems to have a number in it.
In the above, most languages would give you an error because you can't add a string to a number. One of the unique "features" of PHP is that it will sometimes try to convert values between different data types based on how you use them: $x = "10" // a string containing the number 10 Some statements EVALUATE to true or false: $x = (date("D") = "Mon") Īnd you'll often see the statements directly in the if() parentheses: if(date("D") = "Mon") So every if() statement is ultimately checking for a true or false value (called a boolean): if(something is true)Įcho "you'll never see this because $x is true":
#PHP IF ELSE WITH HTML SOFTWARE#
No malicious/illegal software Don't ask for help with phishing software, for example. Don't take the provided answers away from them! 6. Don't delete an answered post People may be searching to solve a similar problem in the future. Use a meaningful title Titles like: "PHP Help", "Help please", "Beginner question", or "I need some help with resolving this issue" are not good and not meaningful. Actively participate when you make a post by answering questions and sharing solutions. Participate Posts that are only intended to get others to solve your problem add nothing to the community.
If you believe someone is wrong, kindly inform them why you think so. When supplying code, preferably use PasteBin or similar. Help us help you! Provide details about your question and be as specific as possible. If someone answers your question, please mark your post as SOLVED.ġ. Review our github to see if your question already has a great answer. Use the PHP if.else statement to execute a code block when a condition is true.Post specific problems or questions you have about PHP or your code.If the $is_authenticated is false, the script shows the login link instead: PHP if Statement Demo Logout Login Code language: HTML, XML ( xml ) Summary The following example uses the if.else statement to show the logout link if $is_authenticated is true. The enclosing tag ?> automatically implies a semicolon. Note that you don’t need to place a semicolon ( ) after the endif keyword because the endif is the last statement in the PHP block. The following example uses the if.else statement to show a message based on the value of the $is_authenticated variable: Code language: HTML, XML ( xml )
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