11-07-2019
The empty line prints str1.
Because it was not matched in scanf() it has the value from the previous line - therefore the str1= assignment,
should set it to "" with one of
str1[0]=0 or str1[0]='\0' or with a bit more overhead strcpy(str1, "").
But you have str1[0]='0' that overwrites the first character of the previous value with a 0 character.
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STRCOLL(3) 1 STRCOLL(3)
strcoll - Locale based string comparison
SYNOPSIS
int strcoll (string $str1, string $str2)
DESCRIPTION
Note that this comparison is case sensitive, and unlike strcmp(3) this function is not binary safe.
strcoll(3) uses the current locale for doing the comparisons. If the current locale is C or POSIX, this function is equivalent to str-
cmp(3).
PARAMETERS
o $str1
- The first string.
o $str2
- The second string.
RETURN VALUES
Returns < 0 if $str1 is less than $str2; > 0 if $str1 is greater than $str2, and 0 if they are equal.
CHANGELOG
+--------+------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+------------------------------------+
| 4.2.3 | |
| | |
| | This function now works on win32. |
| | |
+--------+------------------------------------+
SEE ALSO
preg_match(3), strcmp(3), strcasecmp(3), substr(3), stristr(3), strncasecmp(3), strncmp(3), strstr(3), setlocale(3).
PHP Documentation Group STRCOLL(3)