PHP regular expression to verify whether the input string is the correct license plate number or agricultural machinery number format

In modern society, cars and agricultural machinery have become indispensable means of transportation and agricultural equipment in people's daily life and production. Therefore, on many occasions, we need to identify and verify license plate numbers or agricultural machinery numbers. Regular expressions in PHP provide a convenient and efficient way to perform verification.

In PHP, using regular expressions can help us easily complete the verification of license plate numbers or agricultural machinery numbers. First, we need to understand the format of the license plate number and agricultural machinery number. For ordinary vehicle license plate numbers, the format is "7 characters consisting of provincial characters, letters, numbers, letters, numbers, and letters." The format of agricultural machinery numbering is also relatively fixed, usually in the form of "provincial code 6 digits".

Next, we can write PHP regular expressions based on the above format to verify the correctness of the license plate number or agricultural machinery number. The following is an example of the PHP regular expression corresponding to the license plate number and the agricultural machinery ranking number:

1. PHP regular expression to verify the license plate number

$str = 'Guangdong A12345'; // The license plate number that needs to be verified can be modified according to the actual situation

$pattern = '/^[x{4e00}-x{9fa5}]{1}[A-Z]{1}[A -Z_0-9]{5}$/u';

// The matching rule is: starting with a Chinese character, followed by an uppercase letter, followed by 5 characters composed of letters or numbers

if (preg_match($pattern, $str)) {

echo 'The license plate number is legal';

} else {

echo 'The license plate number is legal' Illegal';

}

2. PHP regular expression to verify agricultural machinery numbering

$str = '410300000001'; // Need to verify Agricultural machinery numbering can be modified according to the actual situation

$pattern = '/^[0-9]{6}$/';

// The matching rule is: 6 digits, no Contains provincial code

if (preg_match($pattern, $str)) {

echo 'This agricultural machinery number is legal';

} else {

echo 'This agricultural machinery number is illegal';

}

Use the above regular expression to easily complete the verification of the license plate number or agricultural machinery number, thereby ensuring that the entered content complies with Require. In actual development, we can encapsulate this code to facilitate use in multiple projects. For example, we can encapsulate the verification function as a class and then call the function through the object.

Finally, it should be noted that when using PHP regular expressions, you need to pay attention to the rules and matching methods of regular expressions. If you are not familiar with the use of regular expressions, it is recommended that you refer to some relevant learning materials to enhance your understanding and mastery.

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