How to validate URL in php?

Question

PHP

Good afternoon! I have a Python server running on flask, it looks pretty primitive

import subprocess
import sys,validators, base64
from flask import Flask
from flask import Response
import urlparse

def get_domain(url):
  base_url = urlparse.urljoin(url, '/') #"{0.scheme}://{0.netloc}/".format(urlsplit(url))
  base_url = base_url[(base_url.index('://')+3):-1]
  if base_url[:4] == "www.":
      base_url = base_url[4:]
  return base_url
app = Flask(__name__)
@app.route("/<url>", methods=['GET'])
def index(url):
    url = base64.b64decode(url)
    if url.find("http") < 0:
        url = "http://" + url
    if validators.url(url) == True: 
        print("Valid")
    else:
        # Check valid adress, do error heandler
        url = "https://sample.com"
    domain = get_domain(url)
    print(url)
    print(domain)
    cmd = './my_app ' + base64.b64encode(url) + ' ' + base64.b64encode(domain)
    PIPE = subprocess.PIPE
    p = subprocess.Popen(cmd, shell=True, stdin=PIPE, stdout=PIPE,
            stderr=subprocess.STDOUT, close_fds=True, cwd='/home/dir')
    resp = Response(p.stdout.read())
    resp.headers['Access-Control-Allow-Origin'] = '*'
    return resp
if __name__ == "__main__":
    context = ("/var/www/httpd-cert/www-root/u_le1.crt", "/var/www/httpd-cert/www-root/u_le1.key")
    app.run(host='0.0.0.0', port=9090, ssl_context=context)

How to implement the same only in php? The whole difficulty is in the validation of domains ..

Answer 1

If you ask Google " validate url php ", then somewhere at the beginning of the output, the documentation for the filter_var() function will be released , and you can use it to reach the list of filters .
And then, if the URL is valid (taking into account all the necessary flags that you could set), you can parse the URL using parse_url ()