A Practical Way to Learn PHP Notations

A practical way to learn PHP symbols, requiring specific code examples

As a commonly used server-side programming language, PHP has flexibility and powerful functions. Symbols Application in PHP is also a very important part. This article will introduce some commonly used symbolic methods in PHP, combined with specific code examples, to help readers better understand and use them.

1. String connection symbol "."

In PHP, the string connection symbol "." is used to connect two strings, and multiple strings can be spliced ​​together. Here is an example:

$str1 = "Hello";
$str2 = "World";
$combinedStr = $str1 . " " . $str2; // The value of $combinedStr is "Hello World"

2. Equal sign assignment symbol "="

In PHP In , the equal sign assignment symbol "=" is used to assign the value on the right side to the variable on the left side. Here is an example:

$age = 25;

3. Arithmetic operation symbols

PHP supports common arithmetic operation symbols, such as the plus sign " " , minus sign "-", multiplication sign "*", division sign "/", etc. The following is an example:

$sum = 10 5; // The value of $sum is 15

4. Comparison operator symbols

Comparison operator symbols are used For comparing the size relationship between two values, common comparison operation symbols include the greater than sign ">", the less than sign "<", the equal sign "==", etc. Here is an example:

$num1 = 10;
$num2 = 5;
$result = $num1 > $num2; // The value of $result is true

5. Logical operation symbols

Logical operation symbols are used to perform logical operations, such as " &&” means AND operation, “||” means OR operation, and “!” means non-operation. Here is an example:

$isAdult = true;
$hasLicense = true;
$isAllowed = $isAdult && $hasLicense; // The value of $isAllowed is true

Through the above code examples, readers can better understand and master the use of symbols in PHP. In actual programming, rational use of symbols can improve the efficiency and readability of the code. I hope readers can practice more and become proficient in the use of these symbols.

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