This is my code:
function get_random(){
$filter_word = '1,2,3,4,5,6,7,8,9';
$array = explode(',', $filter_word);
$randomKeys = array_rand($array, 2);
$str = '';
foreach($randomKeys as $key){
$str = $array[$key];
}
return $str;
}
The problem that if I used array_rand i must know the number of elements to can add the number in array_rand and I can't know something like this (it's a data stored into the database) so if the elements are less than two it gives me an error:
Warning: array_rand(): Second argument has to be between 1 and the number of elements in the array
Is there a better way to make this?
you can use count() before using array_rand-
function get_random(){
$filter_word = '1,2,3,4,5,6,7,8,9';
$array = explode(',', $filter_word);
$str = '';
if(count($array)>1){
$randomKeys = array_rand($array, 2);
foreach($randomKeys as $key){
$str = $array[$key];
}
}
else{
$str = $filter_word;
}
return $str;
}
I suppose you are looking for something like this:
$randCount = rand(1, count($array));
$randomKeys = array_rand($array, $randCount);
Related
Trying to use the implode() function to add a string at the end of each element.
$array = array('9898549130', '9898549131', '9898549132');
$attUsers = implode("#txt.att.net,", $array);
print($attUsers);
Prints this:
9898549130#txt.att.net,9898549131#txt.att.net,9898549132
How do I get implode() to also append the glue for the last element?
Expected output:
9898549130#txt.att.net,9898549131#txt.att.net,9898549132#txt.att.net
//^^^^^^^^^^^^ See here
There is a simpler, better, more efficient way to achieve this using array_map and a lambda function:
$numbers = ['9898549130', '9898549131', '9898549132'];
$attUsers = implode(
',',
array_map(
function($number) {
return($number . '#txt.att.net');
},
$numbers
)
);
print_r($attUsers);
This seems to work, not sure its the best way to do it:
$array = array('9898549130', '9898549131', '9898549132');
$attUsers = implode("#txt.att.net,", $array) . "#txt.att.net";
print($attUsers);
Append an empty string to your array before imploding.
But then we have another problem, a trailing comma at the end.
So, remove it.
Input:
$array = array('9898549130', '9898549131', '9898549132', '');
$attUsers = implode("#txt.att.net,", $array);
$attUsers = rtrim($attUsers, ",")
Output:
9898549130#txt.att.net,9898549131#txt.att.net,9898549132#txt.att.net
This was an answer from my friend that seemed to provide the simplest solution using a foreach.
$array = array ('1112223333', '4445556666', '7778889999');
// Loop over array and add "#att.com" to the end of the phone numbers
foreach ($array as $index => &$phone_number) {
$array[$index] = $phone_number . '#att.com';
}
// join array with a comma
$attusers = implode(',',$array);
print($attusers);
$result = '';
foreach($array as $a) {
$result = $result . $a . '#txt.att.net,';
}
$result = trim($result,',');
There is a simple solution to achieve this :
$i = 1;
$c = count($array);
foreach ($array as $key => $val) {
if ($i++ == $c) {
$array[$key] .= '#txt.att.net';
}
}
I have the following text string: "Gardening,Landscaping,Football,3D Modelling"
I need PHP to pick out the string before the phrase, "Football".
So, no matter the size of the array, the code will always scan for the phrase 'Football' and retrieve the text immediately before it.
Here is my (lame) attempt so far:
$array = "Swimming,Astronomy,Gardening,Rugby,Landscaping,Football,3D Modelling";
$find = "Football";
$string = magicFunction($find, $array);
echo $string; // $string would = 'Landscaping'
Any help with this would be greatly appreciated.
Many thanks
$terms = explode(',', $array);
$index = array_search('Football', $terms);
$indexBefore = $index - 1;
if (!isset($terms[$indexBefore])) {
trigger_error('No element BEFORE');
} else {
echo $terms[$indexBefore];
}
//PHP 5.4
echo explode(',Football', $array)[0]
//PHP 5.3-
list($string) = explode(',Football', $array);
echo $string;
$array = array("Swimming","Astronomy","Gardening","Rugby","Landscaping","Football","3D" "Modelling");
$find = "Football";
$string = getFromOffset($find, $array);
echo $string; // $string would = 'Landscaping'
function getFromOffset($find, $array, $offset = -1)
{
$id = array_search($find, $array);
if (!$id)
return $find.' not found';
if (isset($array[$id + $offset]))
return $array[$id + $offset];
return $find.' is first in array';
}
You can also set the offset to be different from 1 previous.
I have a variable that contains text with values according to an example below:
$data = "5:7|4:1|504:2|1:3|"
And I would like to achieve results like this:
$data[5] = 7;
$data[4] = 1;
$data[504] = 2;
$data[1] = 3;
I tried with explode:
$data = explode("|", $data);
//but it makes $data[0]="5:7"; $data[1]="4:1"; and so on.
Should I use explode again? Is it has any sense, or is there another way? I would like to ask for a hint or help.
There may be a more clever way, but I'd do it like this:
$data = array();
foreach (explode("|", $your_data) as $part)
{
$pieces = explode(':', $part);
// Assumes we have 2 pieces, might want to make sure here...
$data[$pieces[0]] = $pieces[1];
}
Also, I'm not sure what this data represents but keep in mind that array keys will overwrite each other, so 1:1|1:2 will result in an array with only one item (the last piece). There may be good reason to take another approach.
Sure, explode again:
$data = "5:7|4:1|504:2|1:3";
$array = array();
foreach (explode('|', $data) as $pair) {
list($id, $val) = explode(':', $pair);
$array[$id] = $val;
}
Yes you should use explode twice, like this
$newData = array();
$pairs = explode('|',$data);
foreach($pairs as $pair){
$tmp = explode(':',$pair);
$newData[$tmp[0]] = $tmp[1];
}
Try using a regexp:
$data = preg_split ("\||:", $data);
One line version:
$data = array_map(function($d) { return (int)explode(":", $d)[1]; }, explode("|", $data));
I have a string that contains elements from array.
$str = '[some][string]';
$array = array();
How can I get the value of $array['some']['string'] using $str?
This will work for any number of keys:
$keys = explode('][', substr($str, 1, -1));
$value = $array;
foreach($keys as $key)
$value = $value[$key];
echo $value
You can do so by using eval, don't know if your comfortable with it:
$array['some']['string'] = 'test';
$str = '[some][string]';
$code = sprintf('return $array%s;', str_replace(array('[',']'), array('[\'', '\']'), $str));
$value = eval($code);
echo $value; # test
However eval is not always the right tool because well, it shows most often that you have a design flaw when you need to use it.
Another example if you need to write access to the array item, you can do the following:
$array['some']['string'] = 'test';
$str = '[some][string]';
$path = explode('][', substr($str, 1, -1));
$value = &$array;
foreach($path as $segment)
{
$value = &$value[$segment];
}
echo $value;
$value = 'changed';
print_r($array);
This is actually the same principle as in Eric's answer but referencing the variable.
// trim the start and end brackets
$str = trim($str, '[]');
// explode the keys into an array
$keys = explode('][', $str);
// reference the array using the stored keys
$value = $array[$keys[0][$keys[1]];
I think regexp should do the trick better:
$array['some']['string'] = 'test';
$str = '[some][string]';
if (preg_match('/\[(?<key1>\w+)\]\[(?<key2>\w+)\]/', $str, $keys))
{
if (isset($array[$keys['key1']][$keys['key2']]))
echo $array[$keys['key1']][$keys['key2']]; // do what you need
}
But I would think twice before dealing with arrays your way :D
My string is like the following format:
$string =
"name=xxx&id=11&name=yyy&id=12&name=zzz&id=13&name=aaa&id=10";
I want to split the string like the following:
$str[0] = "name=xxx&id=11";
$str[1] = "name=yyy&id=12";
$str[2] = "name=zzz&id=13";
$str[3] = "name=aaa&id=10";
how can I do this in PHP ?
Try this:
$matches = array();
preg_match_all("/(name=[a-zA-Z0-9%_-]+&id=[0-9]+)/",$string,$matches);
$matches is now an array with the strings you wanted.
Update
function get_keys_and_values($string /* i.e. name=yyy&id=10 */) {
$return = array();
$key_values = split("&",$string);
foreach ($key_values as $key_value) {
$kv_split = split("=",$key_value);
$return[$kv_split[0]] = urldecode($kv_split[1]);
}
return $return;
}
$string = "name=xxx&id=11&name=yyy&id=12&name=zzz&id=13&name=aaa&id=10";
$arr = split("name=", $string);
$strings = aray();
for($i = 1; $i < count($arr), $i++){
$strings[$i-1] = "name=".substr($arr[$i],0,-1);
}
The results will be in $strings
I will suggest using much simpler term
Here is an example
$string = "name=xxx&id=11;name=yyy&id=12;name=zzz&id=13;name=aaa&id=10";
$arr = explode(";",$string); //here is your array
If you want to do what you asked, nothing more or less , that's explode('&', $string).
If you have botched up your example and you have a HTTP query string then you want to look at parse_str().