如何检查JSON字符串是否包含某个符号

Question

Hi I'm trying to find out where a symbol has a minus or a decimal point but can't seem to figure out how to do it.

Here is what I have:

  if (strpos($dec, '.')){
        echo "A decimal occured."
      }

Answer 1

PHP's strpos will return the position of the minus or decimal point, if found, or false if not found.

$spaces = '2,223.00';
$pos = strpos($spaces, '.');

if (false === $pos) {
    echo 'No decimal found';
} else {
    echo 'Decimal found at ' . $pos;
}

Note that I used === to check the result.

This is explained in detail in the manual at https://secure.php.net/manual/en/function.strpos.php