Is there any difference in the syntax between php7 and php8?

Yes, there are syntax differences between PHP 7 and PHP 8, including: 1. null coalescing operator (??); 2. Matching expressions; 3. Scalar type declaration; 4. Return Type declaration; 5. Union type; 6. Negative sign operator; 7. Structural attributes; 8. String function str_contains(); 9. Array function array_is_list().

The syntax difference between PHP 7 and PHP 8

Answer:

Yes, there are syntax differences between PHP 7 and PHP 8.

Detailed expansion:

1. null coalescing operator (??)

• Introduced: PHP 8
• Function: When the first operand is null, return the second operand, otherwise return the first operand.

2. Matching expression

• Introduced: PHP 8
• Function: Provides a concise way to match Complex patterns, similar to regular expressions.

3. Scalar type

• Introduced: PHP 7.0
• Feature: Allows scalar values ​​to be explicitly declared as specific Types such as int, float, string, and bool.

4. Return type declaration

• Introduced: PHP 7.0
• Feature: Allows defining return types for functions, making the code More robust.

5. Union type

• Introduced: PHP 8.0
• Feature: Allow function or variable type to be declared as multiple type of union.

6. Negative negation operator

• Introduced: PHP 7.4
• Function: Provides a concise way to return the opposite of a Boolean value.

7. Structural attributes

• Introduced in: PHP 8.0
• Feature: Allows short syntax to be used to access structures in classes Attributes.

8. String function str_contains()

• Introduced: PHP 8.0
• Function: Check whether the string contains Another string.

9. Array function array_is_list()

• Introduced: PHP 8.0
• Function: Check whether the array is a list, That is, the array indexes are consecutive and start from 0.

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