How to get the values only if all the keys have matched?

userVlRl1 0
Viewed 39

I want to make a method that returns keys and values. But only if the keys include the following string "_1" and "__last". If only one matches then exit the function, only if the two string are included in the key, return the key with the value for a weather.

$infoList = array("_key_1"=>array("time"=>9, "day"=>"Tuesday", "weather"=>"sunny", 
                                "humidity"=>"80%"),
                  "_key_2"=>array("time"=>5, "day"=>"Tuesday", "weather"=>"cloudy"),
                  "_key__last"=>array("time"=>3, "day"=>"Sunday", "weather"=>"rainy"))

public function getData() {
 $list = array();
 foreach($infoList as $key){
   if(preg_match('/(_key)_(_1)/', $key) && preg_match('/(_key)_(__last)/', $key) == TRUE){
     $list[$key] = $list[$key]["weather"] 
   } 

 }
 return $list

}
php regex
2 Answers

You are making your life so much more difficult that it need be, use str_contains() its easier than building complex REGEX's and getting very confused by the look of it :)

I also fixed a number of other mistakes, such as the foreach that was not going to work, so check all the code. It is also better to pass data to a function/method otherwise you get into scoping issues!

$infoList = array("_key_1"=>array("time"=>9, "day"=>"Tuesday", "weather"=>"sunny", "humidity"=>"80%"),
                  "_key_2"=>array("time"=>5, "day"=>"Tuesday", "weather"=>"cloudy"),
                  "_key__last"=>array("time"=>3, "day"=>"Sunday", "weather"=>"rainy"));
                  
function getData(Array $infoList) {
    $list = [];
    $found = 0;
    foreach($infoList as $key => $val) {
        if( str_contains($key, '_1') || str_contains($key, '__last') ) {

            $list[$key] = $val["weather"];
            $found++;
        }
    }
    if ( $found >= 2 ) {
        return $list;
    } else {
        return false;
    }

}

$res = getData($infoList);
if ( $res !== false ){
    print_r($res);
} else {
    echo 'Not Found';
}

RESULTS

Array
(
    [_key_1] => sunny
    [_key__last] => rainy
)
RiggsFolly0

If you want to stick with RegEx, you can use positive lookaheads, the same way you check for passwords characters :

<?php
$pattern = '/^(?=.*_1)(?=.*_last).*$/';

$shouldMatch = [
    '_1_last',
    'foo_1bar_lasthello',
    '_last_1',
    'foo_lastbar_1hello'
];

echo 'next ones should match : ' . PHP_EOL;
foreach ($shouldMatch as $item)
{
    if (preg_match($pattern, $item))
        echo $item . PHP_EOL;
}

$shouldNOTMatch = [
    '_2_first',
    'bar_lasthello',
    'foo_las_1hello'
];

echo 'next ones should NOT match : ' . PHP_EOL;
foreach ($shouldNOTMatch as $item)
{
    //  v------------ check
    if (!preg_match($pattern, $item))
        echo $item . PHP_EOL;
}

Output :

next ones should match : 
_1_last
foo_1bar_lasthello
_last_1
foo_lastbar_1hello
next ones should NOT match : 
_2_first
bar_lasthello
foo_las_1hello
Cid0
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