strspn() - string
Finds the length of the initial segment of subject
that contains only characters from mask.
Parameters :
subject - The string to examine. mask - The list of allowable characters. start - The position in subject to
start searching.
If start is given and is non-negative,
then strspn() will begin
examining subject at
the start'th position. For instance, in
the string 'abcdef', the character at
position 0 is 'a', the
character at position 2 is
'c', and so forth.
If start is given and is negative,
then strspn() will begin
examining subject at
the start'th position from the end
of subject. length - The length of the segment from subject
to examine.
If length is given and is non-negative,
then subject will be examined
for length characters after the starting
position.
If length is given and is negative,
then subject will be examined from the
starting position up to length
characters from the end of subject.
Syntax
int strspn
( string $subject
, string $mask
[, int $start
[, int $length
]] )
Example
Output / Return Value
Limitations
Alternatives / See Also
Reference