PHP (2) Program annotation method

PHP has three comment symbols:

1. Multi-line comment symbols closed with "/*" and "*/",

2. Single-line comments starting with "//",

3. Single-line comments starting with "#".

Comments must be written above or to the right of the commented code, not below the code. The following example:

<?php
#这是单行注释
echo "单行注释"; // 这是单行注释
?>

Multi-line comments are as follows:

<?php
echo "多行注释";
/*
这是多行注释
这是多行注释
*/
?>

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