I recently saw a python PPTV interface on github. Can someone help me convert the algorithm in this interface into PHP?

{Code ...}

#!/usr/bin/env python__all__ = ['pptv_download', 'pptv_download_by_id']from ..common import *import reimport timeimport urllibfrom random import randomdef constructKey(arg):    def str2hex(s):        r=""        for i in s[:8]:            t=hex(ord(i))[2:]            if len(t)==1:                t="0"+t            r+=t        for i in range(16):            r+=hex(int(15*random()))[2:]        return r    #ABANDONED  Because SERVER_KEY is static    def getkey(s):        #returns 1896220160        l2=[i for i in s]        l4=0        l3=0        while l4
  
   >> in as3        if k>=0:            return k>>b        elif k<0:            return (2**32+k)>>b        pass    def lot(k,b):        return (k<
   
    ([^<>]+)', xml)    k = r1(r'
    
     ]+>([^<>]+)
    ', xml)    rid = r1(r'rid="([^"]+)"', xml)    title = r1(r'nm="([^"]+)"', xml)    st=r1(r'
    
     ([^<>]+)
    ',xml)[:-4]    st=time.mktime(time.strptime(st))*1000-60*1000-time.time()*1000    st+=time.time()*1000    st=st/1000    key=constructKey(st)    pieces = re.findall('
    
     ]+fs="(\d+)"', xml)    numbers, fs = zip(*pieces)    urls=["http://{}/{}/{}?key={}&fpp.ver=1.3.0.4&k={}&type=web.fpp".format(host,i,rid,key,k) for i in range(max(map(int,numbers))+1)]    total_size = sum(map(int, fs))    assert rid.endswith('.mp4')    print_info(site_info, title, 'mp4', total_size)    if not info_only:        try:            download_urls(urls, title, 'mp4', total_size, output_dir = output_dir, merge = merge)        except urllib.error.HTTPError:            #for key expired            pptv_download_by_id(id, output_dir = output_dir, merge = merge, info_only = info_only)def pptv_download(url, output_dir = '.', merge = True, info_only = False, **kwargs):    assert re.match(r'http://v.pptv.com/show/(\w+)\.html$', url)    html = get_html(url)    id = r1(r'webcfg\s*=\s*{"id":\s*(\d+)', html)    assert id    pptv_download_by_id(id, output_dir = output_dir, merge = merge, info_only = info_only)
    
   
  

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#!/usr/bin/env python__all__ = ['pptv_download', 'pptv_download_by_id']from ..common import *import reimport timeimport urllibfrom random import randomdef constructKey(arg):    def str2hex(s):        r=""        for i in s[:8]:            t=hex(ord(i))[2:]            if len(t)==1:                t="0"+t            r+=t        for i in range(16):            r+=hex(int(15*random()))[2:]        return r    #ABANDONED  Because SERVER_KEY is static    def getkey(s):        #returns 1896220160        l2=[i for i in s]        l4=0        l3=0        while l4
  
   >> in as3        if k>=0:            return k>>b        elif k<0:            return (2**32+k)>>b        pass    def lot(k,b):        return (k<
   
    ([^<>]+)', xml)    k = r1(r'
    
     ]+>([^<>]+)
    ', xml)    rid = r1(r'rid="([^"]+)"', xml)    title = r1(r'nm="([^"]+)"', xml)    st=r1(r'
    
     ([^<>]+)
    ',xml)[:-4]    st=time.mktime(time.strptime(st))*1000-60*1000-time.time()*1000    st+=time.time()*1000    st=st/1000    key=constructKey(st)    pieces = re.findall('
    
     ]+fs="(\d+)"', xml)    numbers, fs = zip(*pieces)    urls=["http://{}/{}/{}?key={}&fpp.ver=1.3.0.4&k={}&type=web.fpp".format(host,i,rid,key,k) for i in range(max(map(int,numbers))+1)]    total_size = sum(map(int, fs))    assert rid.endswith('.mp4')    print_info(site_info, title, 'mp4', total_size)    if not info_only:        try:            download_urls(urls, title, 'mp4', total_size, output_dir = output_dir, merge = merge)        except urllib.error.HTTPError:            #for key expired            pptv_download_by_id(id, output_dir = output_dir, merge = merge, info_only = info_only)def pptv_download(url, output_dir = '.', merge = True, info_only = False, **kwargs):    assert re.match(r'http://v.pptv.com/show/(\w+)\.html$', url)    html = get_html(url)    id = r1(r'webcfg\s*=\s*{"id":\s*(\d+)', html)    assert id    pptv_download_by_id(id, output_dir = output_dir, merge = merge, info_only = info_only)