php - COALESCE and str_replace -


i'm using coalesce update not empty input form sql db , works fine : 

$horiz_deux = $_post["horiz_deux"]; $horiz_gauche = $_post["horiz_gauche"]; other ones ...  mysql_query("update inscription set horiz_deux = coalesce('$horiz_deux', horiz_deux) id = $dossard"); mysql_query("update inscription set horiz_gauche = coalesce('$horiz_gauche', horiz_gauche) id = $dossard"); other updates...

but when i'm trying . replace , 

$horiz_deux = str_replace(".", ",",$_post["horiz_deux"]);

it update other input well.

any idea ?

i think because of function http://php.net/manual/en/function.str-replace.php returning string or array. value of $horiz_gauche diffrent null , therefore selected coalesce-statement causing update horiz_gauche in database.

you try , print out value of $horiz_gauche before insert sql-statement confirm contents.

you try:

$horiz_deux = isset($_post["horiz_deux"]) ? $_post["horiz_deux"] : ''; if ($horiz_deux != '') {   $horiz_deux = str_replace(".", ",",$horiz_deux);   mysql_query("update inscription set horiz_deux = coalesce('$horiz_deux', horiz_deux) id = $dossard"); }

this quite cumbersome, write loop iterates on input-fields , checks them valid input:

$myfieldnames = array('horiz_deux','horiz_hauche','something_else'); foreach ($myfieldnames $fieldname) {   $value = isset($_post[$fieldname]) ? $_post[$fieldname] : '';   $value = str_replace(".", ",",$value);   mysql_query("update inscription set $fieldname = coalesce('$value', $fieldname) id = $dossard"); }

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