I need help in php:
Imagine visiting the link "http://example.com/gen" and every time I visit the result in html on the page is different:
code=0001
refresh the page ...
code=1545
refresh the page ...
code=7845
....
I want to know how can I get the following code to the = sign to use in most places of the page
Makes an array of 10 codes from the URL:
<?php
$codes = array();
for($i = 1; $i<=10; $i++){
$string = file_get_contents("URLHERE");
$string = explode('=',$string);
$code = $string[1];
$codes[] = $code;
}
?>
Usage Usage:
foreach($codes as $code)
echo $code . "<br />";
echo "First Code: {codes[0]}";
?>
Related
I want to allow my website visitors (any Tom, Dick & Harry) submit their links to my webpage for output on my page.
I need to parse user submitted urls before echoing their submitted urls on my page. Need to parse the urls as I won't know what urls they will be submitting nor the structures of their urls.
A user could theoretically visit my page and inject some Javascript code using, for example:
?search=<script>alert('hacked')</script>
You understand my point.
I got to write php script that when users submit their urls, then my php script parses their urls and encodes them by adding urlencode, rawurlencode, intval in the appropriate places before outputting them via htmlspecialchars.
Another wrote this following script. Problem is, it outputs like so:
http%3A%2F%2Fexample.com%2Fcat%2Fsubcat?var_1=value+1&var2=2&this_other=thing&number_is=13
It should output like this:
http://example.com/cat/subcat?var_1=value+1&var2=2&this_other=thing&number_is=13
This is their code ....
Third Party Code:
<?php
function encodedUrl($url){
$query_strings_array = [];
$query_string_parts = [];
// parse URL & get query
$scheme = parse_url($url, PHP_URL_SCHEME);
$host = parse_url($url, PHP_URL_HOST);
$path = parse_url($url, PHP_URL_PATH);
$query_strings = parse_url($url, PHP_URL_QUERY);
// parse query into array
parse_str($query_strings, $query_strings_array);
// separate keys & values
$query_strings_keys = array_keys($query_strings_array);
$query_strings_values = array_values($query_strings_array);
// loop query
for($i = 0; $i < count($query_strings_array); $i++){
$k = urlencode($query_strings_keys[$i]);
$v = $query_strings_values[$i];
$val = is_numeric($v) ? intval($v) : urlencode($v);
$query_string_parts[] = "{$k}={$val}";
}
// re-assemble URL
$encodedHostPath = rawurlencode("{$scheme}://{$host}{$path}");
return $encodedHostPath . '?' . implode('&', $query_string_parts);
}
$url1 = 'http://example.com/cat/subcat?var 1=value 1&var2=2&this other=thing&number is=13';
$url2 = 'http://example.com/autos/cars/list.php?state=california&max_price=50000';
// run urls thru function & echo
// run urls thru function & echo
echo $encoded_url1 = encodedUrl($url1); echo '<br>';
echo $encoded_url2 = encodedUrl($url2); echo '<br>';
?>
So, I changed this of their's:
$encodedHostPath = rawurlencode("{$scheme}://{$host}{$path}");
to this of mine (my amendment):
$encodedHostPath = rawurlencode("{$scheme}").'://'.rawurlencode("{$host}").$path;
And it seems to be working. As it's outputting:
http://example.com/cat/subcat?var_1=value+1&var2=2&this_other=thing&number_is=13
QUESTION 1:
But I am not sure if I put the raw_urlencode() in the right places or not and so best you check.
Also, should not the $path be inside raw_urlencode like so ?
raw_urlencode($path)
Note however that:
raw_urlencode($path)
doesn't output right.
QUESTION 2:
I FURTHER updated their code to a new VERSION and it's not outputting right. Why is that ? Where am I going wrong ?
All I did was add a few lines.
This is my update (NEW VERSION) which outputs wrong. Outputs like this:
http%3A%2F%2Fexample.com%2Fcat%2Fsubcat?var_1=value+1&var2=2&this_other=thing&number_is=13
I added a few lines of my own at the bottom of their code.
MY UPDATE (NEW VERSION):
<?php
function encodedUrledited($url){
$query_strings_array = [];
$query_string_parts = [];
// parse URL & get query
$scheme = parse_url($url, PHP_URL_SCHEME);
$host = parse_url($url, PHP_URL_HOST);
$path = parse_url($url, PHP_URL_PATH);
$query_strings = parse_url($url, PHP_URL_QUERY);
// parse query into array
parse_str($query_strings, $query_strings_array);
// separate keys & values
$query_strings_keys = array_keys($query_strings_array);
$query_strings_values = array_values($query_strings_array);
// loop query
for($i = 0; $i < count($query_strings_array); $i++){
$k = urlencode($query_strings_keys[$i]);
$v = $query_strings_values[$i];
$val = is_numeric($v) ? intval($v) : urlencode($v);
$query_string_parts[] = "{$k}={$val}";
}
// re-assemble URL
$encodedHostPath = rawurlencode("{$scheme}").'://'.rawurlencode("{$host}").$path;
return $encodedHostPath . '?' .implode('&', $query_string_parts);
}
if(!ISSET($_POST['url1']) && empty($_POST['url1']) && !ISSET($_POST['url2']) && empty($_POST['url2']))
{
//Default Values for Substituting empty User Inputs.
$url1 = 'http://example.com/cat/subcat?var 1=value 1&var2=2&this other=thing&number is=138';
$url2 = 'http://example.com/autos/cars/list.php?state=california&max_price=500008';
}
else
{
//User has made following inputs...
$url1 = $_POST['url1'];
$url2 = $_POST['url2'];
//Encode User's Url inputs. (Add rawurlencode(), urlencode() and intval() in user's submitted url where appropriate).
$encoded_url1 = encodedUrledited($url1);
$encoded_url2 = encodedUrledited($url2);
}
echo $link1 = '<a href=' .htmlspecialchars($encoded_url1) .'>' .htmlspecialchars($encoded_url1) .'</a>';
echo '<br/>';
echo $link2 = '<a href=' .htmlspecialchars($encoded_url2) .'>' .htmlspecialchars($encoded_url2) . '</a>';
echo '<br>';
?>
This thread is really about the 2nd code. My update.
Thank You!
I fixed my code.
Answering my own question.
Fixed Code:
function encodedUrledited($url){
$query_strings_array = [];
$query_string_parts = [];
// parse URL & get query
$scheme = parse_url($url, PHP_URL_SCHEME);
$host = parse_url($url, PHP_URL_HOST);
$path = parse_url($url, PHP_URL_PATH);
$query_strings = parse_url($url, PHP_URL_QUERY);
// parse query into array
parse_str($query_strings, $query_strings_array);
// separate keys & values
$query_strings_keys = array_keys($query_strings_array);
$query_strings_values = array_values($query_strings_array);
// loop query
for($i = 0; $i < count($query_strings_array); $i++){
$k = $query_strings_keys[$i];
$key = is_numeric($k) ? intval($k) : urlencode($k);
$v = $query_strings_values[$i];
$val = is_numeric($v) ? intval($v) : urlencode($v);
$query_string_parts[] = "{$key}={$val}";
}
// re-assemble URL
$encodedHostPath = rawurlencode($scheme).'://'.rawurlencode($host).$path;
$encodedHostPath .= '?' .implode('&', $query_string_parts);
return $encodedHostPath;
}
if(!ISSET($_POST['url1']) && empty($_POST['url1']) && !ISSET($_POST['url2']) && empty($_POST['url2']))
{
//Default Values for Substituting empty User Inputs.
$url1 = 'http://example.com/cat/subcat?var 1=value 1&var2=2&this other=thing&number is=138';
$url2 = 'http://example.com/autos/cars/list.php?state=california&max_price=500008';
}
else
{
//User has made following inputs...
$url1 = $_POST['url1'];
$url2 = $_POST['url2'];
//Encode User's Url inputs. (Add rawurlencode(), urlencode() and intval() in user's submitted url where appropriate).
}
$encoded_url1 = encodedUrledited($url1);
$encoded_url2 = encodedUrledited($url2);
$link1 = '<a href=' .htmlspecialchars($encoded_url1) .'>' .htmlspecialchars($encoded_url1) .'</a>';
$link2 = '<a href=' .htmlspecialchars($encoded_url2) .'>' .htmlspecialchars($encoded_url2) . '</a>';
echo $link1; echo '<br/>';
echo $link2; echo '<br/>';
?>
These 2 following lines were supposed to be outside the ELSE. They weren't. Hence all the issue. Moved them outside the ELSE and now script working fine.
$encoded_url1 = encodedUrledited($url1);
$encoded_url2 = encodedUrledited($url2);
I've written some code in php to scrape some preferable links out of the main page of wikipedia. When I execute my script, the links are coming through accordingly.
However, at this point I've defined two functions within my script in order to learn how to pass links from one function to another. Now, my goal is to print the links in the latter function but it only prints the first link and nothing else.
If I use only this function fetch_wiki_links(), I can get several links but when i try to print the same within get_links_in_ano_func() then it prints the first link only.
How can I get them all even when I use the second function?
This is what I've written so far:
include("simple_html_dom.php");
$prefix = "https://en.wikipedia.org";
function fetch_wiki_links($prefix)
{
$weblink = "https://en.wikipedia.org/wiki/Main_Page";
$htmldoc = file_get_html($weblink);
foreach ($htmldoc->find("a[href^='/wiki/']") as $a) {
$links = $a->href . '<br>';
$absolute_links = $prefix . $links;
return $absolute_links;
}
}
function get_links_in_ano_func($absolute_links)
{
echo $absolute_links;
}
$items = fetch_wiki_links($prefix);
get_links_in_ano_func($items);
Your function returned the value at the very first iteration. You will need something like this:
function fetch_wiki_links($prefix)
{
$weblink = "https://en.wikipedia.org/wiki/Main_Page";
$htmldoc = file_get_html($weblink);
$absolute_links = array();
foreach ($htmldoc->find("a[href^='/wiki/']") as $a) {
$links = $a->href . '<br>';
$absolute_links []= $prefix . $links;
}
return implode("\n", $absolute_links);
}
This is my entire code
// include the scrapper
include('simple_html_dom.php');
// connect the page for scrapping
$html = file_get_html('http://www.niagarafallsreview.ca/news/local');
// make empty arrays
$headlines = array();
$links = array();
// look for 'h' headings on page
foreach($html->find('h1') as $header) {
$headlines[] = $header->plaintext;
}
// look for 'a' links that start with 'http://www.niagarafallsreview.ca/2016/04/'
foreach($html->find('a[href^="http://www.niagarafallsreview.ca/2016/04/"]') as $link) {
$links[] = $link->href;
}
// trim the headlines because one on top and bottom were not needed
$output = array_slice($headlines, 1, -1);
// for each header output a nice list of the headers
foreach ($output as $headers){
echo "< a href='#'>$headers</a>" . "<br />";
}
// make sure the links are unique and no doubles are found
$result = array_unique($links);
// for each link output it in a nice list
foreach ($result as $linkk){
echo "<a href='$linkk'>$linkk</a>" . "<br />";
}
this code will produce the headings in a nice list, and will also produce a nice list of the links.
My problem is that i need to combine them, i would like the $header to be the text of the href, and the link in the href to be the $linkk
like this..
< a href ='$linkk'>$headers</a>
I dont know how to do this as i have two foreach statements. I tried to combine them but i was unsuccessful.
Any help will be greatly appreciated.
Thanks.
Try this:
// include the scrapper
include('simple_html_dom.php');
// connect the page for scrapping
$html = file_get_html('http://www.niagarafallsreview.ca/news/local');
// make empty arrays
$headlines = array();
$links = array();
// look for 'h' headings on page
foreach($html->find('h1') as $header) {
$headlines[] = $header->plaintext;
}
// look for 'a' links that start with 'http://www.niagarafallsreview.ca/2016/04/'
foreach($html->find('a[href^="http://www.niagarafallsreview.ca/2016/04/"]') as $link) {
$links[] = $link->href;
}
// trim the headlines because one on top and bottom were not needed
$output = array_slice($headlines, 1, -1);
// make sure the links are unique and no doubles are found
$result = array_unique($links);
// for each link output it in a nice list
foreach ($result as $i=>$linkk) {
$headline = isset($output[$i]) ? $output[$i] : '(empty)';
echo "<a href='$linkk'>$headline</a>" . "<br />";
}
Here is the foreach you are looking for:
foreach($output as $i=>$headers) {
$linkk = $result[$i];
echo "< a href='$linkk'>$headers</a>" . "<br />";
}
This assumes the arrays have the same length and also the correct order.
Excuse me if the title isn't completely clear.
but i've got a value that is the outcome of a sum. Called $addCols and a variable that is just html. What i want is to repeat the html with the addCols variable.
$addCols = 4 //for example
$html .= '<div>test</div>';
And i wish to get the following result:
// Result
test
test
test
test
What i've tried:
$result = $addCols * $html;
echo $result;
There is a built-in function for this:
echo str_repeat("<div>test</div>", $addCols);
Documentation
Built-in functions will always be better/faster than manually-coded solutions.
create a for loop, this will post the html code as many times as your variable states giving the requested output.
for($x = 0; $x < $addCols; $x++)
{
echo '<div>text</div>';
}
Just use str_repeat() function in php or run a loop. Use the code below
With str_repeat
$addCols = 4 ;//for example
$html = '<div>test</div>';
echo str_repeat($html, $addCols);
With loop
$addCols = 4; //for example
$html = '<div>test</div>';
for($x = 0; $x < $addCols; $x++)
{
echo $html;
}
With while loop
$html = '<div>test</div>';
$addCols = 4 ;//for example
$x=0;
while($x < $addCols)
{
echo $html;
$x++;
}
Hope this helps you
I Want to Parse Show Time of Some city from Google Page:
Here I Get Movie Names from Page1:
http://www.google.co.in/movies?near=chennai&hl=en&ei=8OIaUr-0EYrFkwX9kICQCA_&date=0
And I Get Show timings from Page2:
http://www.google.co.in/movies?near=chennai&hl=en&ei=8OIaUr-0EYrFkwX9kICQCA_&date=0&tid=8a030c04960c6341
My Php Code:
$htm = file_get_html('http://www.google.co.in/movies?near=chennai&hl=en&ei=8OIaUr-0EYrFkwX9kICQCA_&date=0');
$linker = $htm->find('div h2 a');
$value = $linker[2]->href;
$link = "http://www.google.co.in$value";
$htmls = file_get_html($link);
If I echo "$link"; it Print Same link as Page 2:
$cinemaname = $htmls->find('div[class=name]');
$cinematimes = $htmls->find('div[class=times]');
echo strip_tags($cinemaname[0])."<div>";
echo strip_tags($cinematimes[0])."<div>";
If I echo $cinemaname[0]"; It Printing from Page 1, but I want to Print from Page2.
This issue about link encoded. Your link was return below: &
http://www.google.co.in/movies?near=chennai&hl=en&ei=8OIaUr-0EYrFkwX9kICQCA_&date=0&tid=8a030c04960c6341
You have to decode it with html_entity_decode function
$value = $linker[2]->href;
$link = html_entity_decode("http://www.google.co.in".$value);
$htmls = file_get_html($link);