How to use PHP regular expression to verify whether the input string is in the correct vehicle model format

When verifying vehicle models, PHP regular expressions (regular expression) can very conveniently help us process input strings. This article will detail how to use PHP regular expressions to verify whether the input string conforms to the correct vehicle model format.

1. Vehicle model format

Before conducting vehicle model verification, we need to first understand what the correct vehicle model format is. Generally speaking, the vehicle model format restrictions vary from region to region, but generally include the following elements:

1. Brand Name
2. Car Series Name
3. Model Name
4. Year
5. Power type

For example, the vehicle model format of a 2020 Audi A3 35 TFSI Limousine contains the above five elements.

In China, the format of vehicle models is relatively uniform, usually in the form of "brand name, car series name, model name, year, power type". The details are as follows:

1. Brand name: usually the name of the vehicle manufacturer
2. Car series name: usually the car series to which the model belongs
3. Model name: usually The specific model of the model
4. Year: Indicates the year of production of the model
5. Power type: Usually the power method used by the model, such as gasoline, diesel, electric, etc.

Therefore, an example of a correct car model format is "Mercedes-Benz E-Class E300L 2020 2.0T Automatic Luxury Edition".

2. Use PHP regular expressions

When using PHP regular expressions for vehicle model verification, we need to first define a regular expression pattern for the vehicle model. The following is a basic vehicle model regular expression pattern:

/^[x{4e00}-x{9fa5}]+[A-Za-z0-9]+[x{4e00}-x{9fa5}]+[A-Za-z0-9]+(201[0-9]|202[0-9])(款)?(s+(1|2).d[T|D|H|E])?$/u

The meaning of this regular expression pattern is as follows:

1. begins with ^ and ends with $ ends, indicating that the entire string must match the regular expression pattern
2. Use [x{4e00}-x{9fa5}] to match Chinese characters
3. Use [A-Za-z0-9] means matching English letters and numbers
4. Use means that the previous character must appear one or more times in a row
5. Use (201[0-9]|202[0-9]) means matching numbers from 2010 to 2029
6. Use (section)? means matching the optional "section" character
7. Use s means match one or more spaces
8. Use (1|2).d [T|D|H|E] means matching the four power types of 1.0T, 2.0D, 1.5H or 2.0E
9. Use (s (1|2).d[T |D|H|E])?Indicates that the power type part is optional
10. Use /u to specify the regular expression pattern for UTF-8 encoding

3. PHP verification example

The following is a basic PHP verification example:

<?php
$vin = "奔驰E级E300L 2020款 2.0T 自动豪华版";
$pattern = "/^[x{4e00}-x{9fa5}]+[A-Za-z0-9]+[x{4e00}-x{9fa5}]+[A-Za-z0-9]+(201[0-9]|202[0-9])(款)?(s+(1|2).d[T|D|H|E])?$/u";
if (preg_match($pattern, $vin)) {
    echo "输入串是一个正确的车辆型号格式。
";
} else {
    echo "输入串不是一个正确的车辆型号格式。
";
}
?>

The above example will output "The input string is a correct vehicle model format." String, indicating The input string conforms to the correct vehicle model format.

It should be noted that the above regular expression is only a basic vehicle model regular expression pattern. If you need to verify the vehicle model format more accurately, it needs to be adjusted and optimized according to the specific situation.

In short, it is very simple and convenient to use PHP regular expressions for vehicle model verification. You only need to define a corresponding regular expression pattern. Hopefully this article will help you successfully conduct vehicle model verification.

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