I have an input where the user informs several product codes, and the system returns a list.
But I need to validate the string or verify it is exactly like this: 132,234,14,56
That is, each code separated by a comma.
I tried to do this, but it did not work:
if (preg_match('/^,/', $ids)) {
echo "erro nas informações";
}
NOTE: It must always be integers, separated by, can not end with, can not contain letters and no space.
So I understand it is a list containing an indeterminate number of integers separated by commas. So, it would look like this:
if(preg_match("/^(\d+,)*\d+/",$ids)===false){
echo "erro nas informações";
}
One way is to compare the number of commas in the string and the amount of data that these commas separate, for example:
$string = "132,234,14,56";
if(substr_count($string,",") == (count(array_filter(explode(",",$string))) - 1)){
echo "Valida";
} else {
echo "Invalida";
}
In your example, you have three commas that separate four values, substr_count counts the quantity of commas, and compares with the amount of values by doing a explode in the string and then a array_filter to eliminate voids.
You can also validate values using a callback function in array_filter , eg:
$strings = array("132,234,14,56","132,234,14,56,ABC","132,234,14,56,",",132,234,14,56,ABC","1,2,3");
foreach ($strings as $string){
if(substr_count($string,",") == (count(array_filter(explode(",",$string),'is_numeric')) - 1)){
echo "String $string é válida";
} else {
echo "String $string é inválida";
}
echo PHP_EOL;
}
Try the strpos .
if (strpos($mystring, ".") !== false) {
//código
}