String to time - convert eregi_replace to preg_match

Question

Now I'm using function eregi_replace() which is deprecated and I want to convert it to function preg_match(). Now I have this:

foreach ($lesson as $key => $val) {
    $lesson_time[$key]->fromTime = eregi_replace('([0-9]{2})([0-9]{2})', '\1:\2',$val->fromTime);
}

where input ($val->fromTime) is string for example 0830 or 1150 and output is 08:30 or 11:50. I'm not good with regex so I would like to ask how this function with the same process can be convert to preg_match().

Answer 1

preg_match('/([0-9]{2})([0-9]{2})/', $val->fromTime, $match);

print_r($match);

You can't replace string with preg_match. You can use preg_replace.

preg_replace('/([0-9]{2})([0-9]{2})/', '$1:$2', $val->fromTime);

Answer 2

try this

echo preg_replace('/([0-9]{2})([0-9]{2})/', '\\1:\\2',$val->fromTime);

Answer 3

$lesson_time[$key]->fromTime = eregi_replace('/([0-9]{2})([0-9]{2})/','$1:$2',$val->fromTime);