一个正则表达式，用于匹配单个字符，后跟数字，以“c”结尾

Question

I need a regex for the following pattern:

a single character from [e-g] followed by one or more numbers that ends with character 'c'.

for example e123f654g933c expected result:

Array
(
    [0] => Array
        (
            [0] => e123
            [1] => f654
            [2] => g933
        )

)

or

e123f654g933ce99f77g66c expected result:

Array
(
    [0] => Array
        (
            [0] => e123
            [1] => f654
            [2] => g933
        ),
    [1] => Array
        (
            [0] => e99
            [1] => f77
            [2] => g66
        )

)

I tried using the following but I don't know what to do with 'c' part. I used this ([e-g]{1}[0-9]{1,}c)+ but it fails.

$subject="e123f654g933ce99f786g776c";
preg_match_all('/[e-g]{1}[0-9]{1,}/', $subject, $match);
print '<pre>' . print_r($match,1) . '</pre>';

Array
(
    [0] => Array
        (
            [0] => e123
            [1] => f654
            [2] => g933
            [3] => e99
            [4] => f786
            [5] => g776
        )

)

thanks.

Answer 1

I couldn't manage to generate your multi dimensional output array via a single regex function call.

Code (Demo: https://3v4l.org/f5nnk )

$strings=[
    'e123f654g933c',
    'e123f654g933ce99f77g66c'
];

foreach($strings as $string){
    var_export(
        array_map(
            function($v){
                return preg_match_all('/[e-g]\d+/',$v,$out2)?$out2[0]:[];  // split the groups by string format
                // or return preg_split('/\d+\K/',$v,NULL,PREG_SPLIT_NO_EMPTY);
                // or return preg_split('/(?=[e-g])/',$v,NULL,PREG_SPLIT_NO_EMPTY);

            },
            preg_match_all('/(?:[e-g]\d+)+(?=c)/',$string,$out1)?$out1[0]:[]  // split into groups using c
            // or explode('c',rtrim($string,'c'))
            // or array_slice(explode('c',$string),0,-1)
            // or preg_split('/c/',$string,NULL,PREG_SPLIT_NO_EMPTY)
        )
    );
    echo"

";
}

Output:

array (
  0 => 
 array (
    0 => 'e123',
    1 => 'f654',
    2 => 'g933',
  ),
)

array (
  0 => 
  array (
    0 => 'e123',
    1 => 'f654',
    2 => 'g933',
  ),
  1 => 
  array (
    0 => 'e99',
    1 => 'f77',
    2 => 'g66',
  ),
)