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"PHP Basics" tags in PHP

2022-07-27 08:06:00 【Go home at night】

Functional requirements

Use different marking methods PHP Code to identify .

The sample code

<!doctype html>

<html>

<head>

<meta charset="utf-8">

<title>php Common marks in </title>

</head>



<body>

<?php echo " Use standard tag formats "; ?>

<br />

<? echo " Use short tag format ";?>

</body>

</html>

Running results

Knowledge description

PHP Is an embedded scripting language , In the actual development, it is often associated with HTML The content is mixed together , To distinguish HTML and PHP Code , You need to use a tag pair PHP Code to identify .

<?php echo " Use standard tag formats "; ?>： Is a paragraph embedded in HTML Medium PHP Code . among “<?php” and “?>” yes PHP One of the marks , Specifically used to contain PHP Code ,echo Used to output one or more strings . Semicolon of the last statement before the closing tag “;” It can be omitted . This is a standard way of marking , Is the most commonly used tag type , The server cannot disable this style of markup .PHP This is the recommended way .

<? echo " Use short tag format ";?>： Short tag format in “<?” Start , With “?>” end . When use , Need to put php.ini Medium short_open_tag Option set to On, It can only be used after the short mark function is turned on .

Be careful ： If the script contains XML sentence , Short marks should be avoided “<? ?>”, To select a standard tag “<?php ?>”. because “<?” yes XML A processing instruction of the parser , If the script contains XML Statement and use short tag format ,PHP Parsers may be confused XML Processing instructions and PHP Start marker .

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"PHP Basics" tags in PHP

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