How to convert uppercase names to underscore separated names in php

This article mainly introduces how PHP converts uppercase naming into underscore-separated naming. This article explains how to convert some naming methods that are not accustomed to the uppercase style, such as Pascal naming and camel case naming. Friends who need it can refer to it

Sometimes it is necessary to convert the uppercase characters in a string to _ lowercase. You will encounter this problem when naming variables. Just enter the code:

$name = 'AppPromoZhongQiu2014ActiveStatusSelector';

echo cc_format($name);
function cc_format($name){
  $temp_array = array();
  for($i=0;$i<strlen($name);$i++){
    $ascii_code = ord($name[$i]);
    if($ascii_code >= 65 && $ascii_code <= 90){
      if($i == 0){
         $temp_array[] = chr($ascii_code + 32);
      }else{
        $temp_array[] = '_'.chr($ascii_code + 32);
      }
    }else{
      $temp_array[] = $name[$i];
    }
  }
  return implode('',$temp_array);
}

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