How to search array with first 3 character of its value in php

问题

I want to get the browser details of the client. so that am using $_SERVER['HTTP_USER_AGENT'] to get the details but it get some extra information also like

Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.90 Safari/537.36

in chrome browser. what i have done is convert the string into an array like

Array ( [0] => Mozilla/5.0 [1] => (Windows [2] => NT [3] => 10.0; [4] => Win64; [5] => x64) [6] => AppleWebKit/537.36 [7] => (KHTML, [8] => like [9] => Gecko) [10] => Chrome/60.0.3112.90 [11] => Safari/537.36 )

If i search for Chr -- i want it to search the array and return Chrome/60.0.3112.90 .

Please suggest solution for this thanks.

Code :

echo $browser = $_SERVER['HTTP_USER_AGENT'];


$strArray = explode(' ',$browser);

print_r($strArray);

回答1:

You can create function to search from array

echo $browser = $_SERVER['HTTP_USER_AGENT'];


$strArray = explode(' ',$browser);

print_r($strArray);
function search_from_array($array,$string)
{
  $return_str = "";
  foreach ($array as $key => $value) {
    $pos = stripos($value, $string);
    if($pos !== false)
      $return_str=$value;
  }
  return $return_str;
}

echo search_from_array($strArray,"chr");

回答2:

The way you're converting the user-agent to an array is quite faulty, for example "Windows NT" becomes ['Windows','NT'] and this is not something you want.

You might want to use ua-parser to extract the user-agent information in a better way.

require_once 'vendor/autoload.php';
use UAParser\Parser;

$ua = "Mozilla/5.0 (Macintosh; Intel Ma...";

$parser = Parser::create();
$result = $parser->parse($ua);

print $result->ua->family;            // Safari
print $result->ua->major;             // 6
print $result->ua->minor;             // 0
print $result->ua->patch;             // 2
print $result->ua->toString();        // Safari 6.0.2
print $result->ua->toVersion();       // 6.0.2

print $result->os->family;            // Mac OS X
print $result->os->major;             // 10
print $result->os->minor;             // 7
print $result->os->patch;             // 5
print $result->os->patchMinor;        // [null]
print $result->os->toString();        // Mac OS X 10.7.5
print $result->os->toVersion();       // 10.7.5

print $result->device->family;        // Other

print $result->toString();            // Safari 6.0.2/Mac OS X 10.7.5
print $result->originalUserAgent;     // Mozilla/5.0 (Macintosh; Intel Ma...

回答3:

With the added need for searching for OS that is written in comments the accepted answer will not work well.
@Nabils answer will work quite well but since it splits the string in very small pieces it may be hard to use.

I thought I could use preg_split and create a good array to search and I think I made it.
I don't know all variations of user agents but they seem to follow a pattern.

This will split on space but also on ( and ).

$input_line = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.90 Safari/537.36";
$arr = preg_split("/( \()|(\) )/", $input_line);

$arr2 =explode(" ", end($arr)); // explode "Chrome/60.0.3112.90 Safari/537.36" on space
Unset($arr[count($arr)-1]); // remove above exploded
$arr = Array_merge($arr,$arr2); // reinsert them as two items
//Var_dump($arr);

$search = "Chr";

Foreach($arr as $val){
    If($search == Substr($val,0,3)) echo $val;
}

See here how it works: https://3v4l.org/qF65g

回答4:

You can use regex on the string.

$str = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.90 Safari/537.36";

$search = "Chr";
Preg_match("/". $search . ".*?\/\d+\.\d+\.\d+\.\d+/", $str, $match);

Var_dump($match);

It will capture the search and any characters til / then your digits with dots.

https://3v4l.org/uYpoP

来源：https://stackoverflow.com/questions/45499717/how-to-search-array-with-first-3-character-of-its-value-in-php

标签

php

arrays

user-agent