Sort an array help

[dsbpac]

I'm having an issue sorting an array.

I'm getting an error of "Warning: ksort() expects parameter 1 to be array, null given in"

 

The print_r output of the array is Array ( [0] => Array ( [text] => 96.1 km [value] => 96113 ) [1] => Array ( [text] => 52.1 km [value] => 52096 ) [2] => Array ( [text] => 102 km [value] => 102064 ) [3] => Array ( [text] => 30.0 km [value] => 29992 ) [4] => Array ( [text] => 43.9 km [value] => 43864 ) [5] => Array ( [text] => 57.4 km [value] => 57408 ) [6] => Array ( [text] => 82.2 km [value] => 82154 ) [7] => Array ( [text] => 73.6 km [value] => 73620 ) [8] => Array ( [text] => 118 km [value] => 118016 ) [9] => Array ( [text] => 137 km [value] => 136921 ) [10] => Array ( [text] => 61.6 km [value] => 61574 ) [11] => Array ( [text] => 74.2 km [value] => 74193 ) [12] => Array ( [text] => 226 km [value] => 226166 ) [13] => Array ( [text] => 140 km [value] => 140145 ) [14] => Array ( [text] => 126 km [value] => 126140 ) [15] => Array ( [text] => 45.5 km [value] => 45520 ) [16] => Array ( [text] => 211 km [value] => 211070 ) [17] => Array ( [text] => 54.1 km [value] => 54145 ) [18] => Array ( [text] => 187 km [value] => 186855 ) [19] => Array ( [text] => 271 km [value] => 271334 ) [20] => Array ( [text] => 219 km [value] => 218848 ) [21] => Array ( [text] => 67.0 km [value] => 67016 ) [22] => Array ( [text] => 13.6 km [value] => 13591 ) [23] => Array ( [text] => 153 km [value] => 153396 ) [24] => Array ( [text] => 11.5 km [value] => 11492 ) ).

 

All I want to do is be able to sort the array by the lowest number in either text or value and display that single number.

<?php

include 'config/db_functions.php';

//run the query
$loop = mysql_query("SELECT * FROM NEW_Venues WHERE game_nights = '5' AND status = '1'")
   or die (mysql_error());



while ($row = mysql_fetch_array($loop))
{

$postcode2 = $row['zip'];
$venue = $row['venue'];
$postcode1=('33071');;


$url = "http://maps.googleapis.com/maps/api/distancematrix/json?origins=$postcode2&destinations=$postcode1&mode=driving&language=en-EN&sensor=false";
 
$data = @file_get_contents($url);
 
$result = json_decode($data, true);

ksort($items);
foreach($result['rows'] as $distance) {;

echo '' . $venue . ' - ' . $distance['elements'][0]['distance']['text'] . ' <br>';


$items[] = $distance['elements'][0]['distance'];
$items1[] = $distance['elements'][0]['distance'];
$itemsname[] = $venue;
}

}




ksort($items1);
foreach ($items1 as $key => $val) {
    echo "$key = $val <br>";
}







print_r(array_values($items));


?>

[scootstah]

$items is not defined in the code you gave at the time of calling ksort().

 

You should be developing with E_NOTICE errors turned on. You would have seen the undefined variable error.

 

ini_set('display_errors', 1);
error_reporting(-1);

[dsbpac]

I get this when turning those on.

Strict Standards: ksort() [function.ksort]: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/Chicago' for 'CDT/-5.0/DST'

[scootstah]

You need to set a default timezone in your php.ini

 

http://php.net/manual/en/datetime.configuration.php#ini.date.timezone

[Barand]

Given your array looks like this:

 

$data =  Array (
    0 => Array ( 'text' => '96.1 km', 'value' => 96113 ),
    1 => Array ( 'text' => '52.1 km', 'value' => 52096 ),
    2 => Array ( 'text' => '102 km',  'value' => 102064 ),
    3 => Array ( 'text' => '30.0 km', 'value' => 29992 ),
    4 => Array ( 'text' => '43.9 km', 'value' => 43864 ),
);

 

then using ksort() will merely sort on the keys I highlighted in red. You will need a custom sort, using usort() to sort on the text values

$data =  Array ( 
    0 => Array ( 'text' => '96.1 km', 'value' => 96113 ), 
    1 => Array ( 'text' => '52.1 km', 'value' => 52096 ), 
    2 => Array ( 'text' => '102 km',  'value' => 102064 ), 
    3 => Array ( 'text' => '30.0 km', 'value' => 29992 ), 
    4 => Array ( 'text' => '43.9 km', 'value' => 43864 ),
);

usort($data, function($a, $b) {
        return strnatcmp($a['text'], $b['text']);
        });
        
echo '<pre>',print_r($data, true),'</pre>';

which gives

Array
(
    [0] => Array
        (
            [text] => 30.0 km
            [value] => 29992
        )

    [1] => Array
        (
            [text] => 43.9 km
            [value] => 43864
        )

    [2] => Array
        (
            [text] => 52.1 km
            [value] => 52096
        )

    [3] => Array
        (
            [text] => 96.1 km
            [value] => 96113
        )

    [4] => Array
        (
            [text] => 102 km
            [value] => 102064
        )

)

Alternatively, you can sort on the "value" values using

usort($data, function($a, $b) {
        return $a['value'] - $b['value']);
        });

[dsbpac]

I'm getting an syntax error, unexpected T_FUNCTION when I add

 

usort($data, function($a, $b) {
return strnatcmp($a['text'], $b['text']);
});

echo '<pre>',print_r($data, true),'</pre>';

[Ch0cu3r]

The code provided by Barand should be fine. Im guessing you are running a version of PHP which is older than PHP5.3 (this was released over 6 years ago!). You should consider updating PHP to a much newer version (ideally 5.4.x minimum or preferably php5.6.x)

 

Anyway the alternative to Barands code would be not to use anonymous functions

function sortValues($a, $b) {
    return strnatcmp($a['text'], $b['text']);
}
usort($data, 'sortValues');

[dsbpac]

Thank you everyone for your help!! I have my code working just as I want on my test hosting server that is running php version 5.2.17. When I move it over to the actual server I want to use it on that is running php version 5.3.29. its not displaying any type of input inside the foreach loop including a simple echo test text.

 

Section of code the issue is in I think

$url = "http://maps.googleapis.com/maps/api/distancematrix/json?origins=$postcode2&destinations=$postcode1&mode=driving&language=en-EN&sensor=false";
 
$data = @file_get_contents($url);
 
$result = json_decode($data, true);



foreach($result['rows'] as $distance) {;

$items2[] = array(
    'info' => $distance['elements'][0]['distance'],
    'venue' => $venue,
    'vid' => $vid,
  );


}

FULL CODE

<?php


ini_set('display_errors', 1);
error_reporting(-1);


include 'config/db_functions.php';




//run the query
$loop = mysql_query("SELECT * FROM NEW_Venues WHERE game_nights = '5' AND status = '1'")
   or die (mysql_error());


$items = null;
$items1 = null;
while ($row = mysql_fetch_array($loop))
{

$postcode2 = $row['zip'];
$venue = $row['venue'];
$vid = $row['vid'];
$postcode1=('33462');;


$url = "http://maps.googleapis.com/maps/api/distancematrix/json?origins=$postcode2&destinations=$postcode1&mode=driving&language=en-EN&sensor=false";
 
$data = @file_get_contents($url);
 
$result = json_decode($data, true);



foreach($result['rows'] as $distance) {;

$items2[] = array(
    'info' => $distance['elements'][0]['distance'],
    'venue' => $venue,
    'vid' => $vid,
  );


}

}




function sortValues($a, $b) {
    return strnatcmp($a['info']['text'], $b['info']['text']);
}
usort($items2, 'sortValues');



$venueid = $items2[0]['vid'];
$venuename = $items2[0]['venue'];

echo "Sunday - $venuename<br>";



?>

[scootstah]

Probably because you have a syntax error. Turn error reporting on!

 

foreach($result['rows'] as $distance) {; <---

[dsbpac]

I did already try taking that out. I copy and pasted the working original into here since I tried several things and didn't want an self made error.

 

When i turn on error reporting i get Notice: Undefined offset: 1 line 16

[scootstah]

What is line 16?

[dsbpac]

Okay I have been playing with this all day and decided to go back to the first script i started with and it's still producing the error.

 

Warning: Invalid argument supplied for foreach() in

<?php
ini_set('display_errors', 1);
error_reporting(-1);


$postcode1=('CB13HR');
$postcode2=('CB23JX');
 
$url = "http://maps.googleapis.com/maps/api/distancematrix/json?origins=$postcode2&destinations=$postcode1&mode=driving&language=en-

EN&sensor=false";
 
$data = @file_get_contents($url);
 
$result = json_decode($data, true);
 
foreach($result['rows'] as $distance) {
	echo 'Distance from you: ' . $distance['elements'][0]['distance']['text'] . ' (' . $distance['elements'][0]['duration']['text'] . 

' in current traffic)';
}

?>

 I also tried to replace json_decode with

json_decode( preg_replace('/[\x00-\x1F\x80-\xFF]/', '', $json_string);, true );

and it returned nothing. Thanks for any and all help ahead of time.

[mac_gyver]

edit: there is no $result['rows'] in your json decoded data. i recommend using the code/method you were given in this thread.

[mac_gyver]

further to my reply above, if your previous code did have a $result['rows'] in the json decoded data, but it doesn't now, your file_get_contents() is likely failing. you should never use the @ error suppressor in any code.

 

do you get any php errors from the code after you remove the @ in front of the file_get_contents() statement?

[dsbpac]

First off let me thank everyone for their help so far. After trying a few different things and getting an error message. I figured out that allow_url_fopen is OFF. How would I go about CURL to get the data I'm requesting since I'm pretty sure that would be an alternative option.

[mac_gyver]

there's a ton of curl examples to be found by searching the web.

 

the following basic example should work for you (provided that the curl extension is enabled) -

$url = "http://maps.googleapis.com/maps/api/distancematrix/json?origins=CB13HR&destinations=CB23JX&mode=driving&language=en-EN&sensor=false";

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$result = json_decode(curl_exec($ch), true);

echo '<pre>';
print_r($result);

[dsbpac]

Thank you very much for your help. I was able to get the script up and running just like I wanted and it works perfect. Shout out to  mac_gyver, scootstah, Ch0cu3r, and Barand for assisting me.