CodeIgniter中如何从URL获取含斜杠的发票号参数？

Hey there! I get it—those slashes are messing with your ability to grab the full invoice number (like CN/00003 or CN-00003) from your URL. Let's break down a couple of reliable solutions that handle both formats seamlessly.

Solution 1: Use Regular Expressions (Most Flexible) #

Regex is perfect here because it can match both slash-separated (CN/00003) and hyphen-separated (CN-00003) invoice numbers in one go, no matter where they sit in the URL.

Example in JavaScript: #

const url = "http://localhost/demo/company/warehouse_subportal/printEway/CN/00003";
// Regex to match "CN" followed by either / or -, then any sequence of digits
const invoiceRegex = /CN[\/-]\d+/;
const matchResult = url.match(invoiceRegex);

// Extract the full invoice number if a match is found
const fullInvoiceNumber = matchResult ? matchResult[0] : "No invoice number found";
console.log(fullInvoiceNumber); // Outputs: CN/00003

Example in Python: #

import re

url = "http://localhost/demo/company/warehouse_subportal/printEway/CN-00003"
invoice_regex = r"CN[\/-]\d+"
match_result = re.search(invoice_regex, url)

full_invoice_number = match_result.group(0) if match_result else "No invoice number found"
print(full_invoice_number) # Outputs: CN-00003

If your invoice prefix isn't always CN, tweak the regex to be more general—like r"[A-Z]{2}[\/-]\d+" to match any two uppercase letters followed by a separator and digits.

Solution 2: Split the URL Path (For Consistent URL Structures) #

If you know the invoice number is always the last one or two segments of the URL path, splitting the path and combining relevant parts works like a charm.

Example in JavaScript: #

const url = new URL("http://localhost/demo/company/warehouse_subportal/printEway/CN/00003");
// Split the path into segments and filter out empty strings from leading/trailing slashes
const pathSegments = url.pathname.split("/").filter(seg => seg !== "");

let fullInvoiceNumber;
const lastSegment = pathSegments[pathSegments.length - 1];
const secondLastSegment = pathSegments[pathSegments.length - 2];

// Check if the second-last segment is the invoice prefix (like CN)
if (secondLastSegment === "CN") {
  fullInvoiceNumber = `${secondLastSegment}/${lastSegment}`;
} else if (lastSegment.startsWith("CN-")) {
  // Handle the hyphen-separated invoice number case
  fullInvoiceNumber = lastSegment;
}

console.log(fullInvoiceNumber); // Outputs: CN/00003

This method is ideal if your URL structure never changes—just adjust the logic based on how your invoice numbers are embedded in the path.

内容的提问来源于stack exchange，提问作者itsme