Regular Expression Help
Hi
It should be easy to extract digits and characters, some thing like.
//String Numbers[]
//String Mulitpliers[]
//S is the string that contains the sequence of digits and operators.
$i=0;
$n=0;
while($S[i] != null)
{
switch($S[i])
{
case '0','1','2','3','4','5','6','7','8','9': $Numbers[n] =
$Numbers[n] + $S[i];
case 'x','*': $Mulitpliers[n] = $Mulitpliers[n] + $S[i];
case ' ': $n = $n+1;
}
$i = $i+1;
}
Lars
"Hoss" <komeatshield@yahoo.com> skrev i meddelandet
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You could use preg_match_all with the following regular expression (it
just extracts the numbers from a string and puts them in an array)
(\d+)
preg_match_all('/(\d+)/', '23x 8x 15',$matches);
Are you only interested in extracting the numbers, or is it important
to get the 'x' too? If it is dimensions, then it will always have
three (nonnegative) numbers in some form, the expression I posted
should work (UNLESS they enter something like '12.1 x5.2 x 5')
You could try
preg_match_all('/([09.]+)/', '23.5x 8x 15',$matches);
which will work for decimals, but it will fail if your string has
periods in it that are not decimal points '12.5 x. 1.2. x.'
