Delicious Bookmark this on Delicious Share on Facebook SlashdotSlashdot It! Digg! Digg



PHP : Function Reference : String Functions : substr_compare

substr_compare

Binary safe comparison of 2 strings from an offset, up to length characters (PHP 5)
int substr_compare ( string main_str, string str, int offset [, int length [, bool case_insensitivity]] )

Example 2474. A substr_compare() example

<?php
echo substr_compare("abcde", "bc", 1, 2); // 0
echo substr_compare("abcde", "de", -2, 2); // 0
echo substr_compare("abcde", "bcg", 1, 2); // 0
echo substr_compare("abcde", "BC", 1, 2, true); // 0
echo substr_compare("abcde", "bc", 1, 3); // 1
echo substr_compare("abcde", "cd", 1, 2); // -1
echo substr_compare("abcde", "abc", 5, 1); // warning
?>

Code Examples / Notes » substr_compare

sleek

Modified version of the original posted function. Use this one:
<?php
if (!function_exists('substr_compare')) {
   function substr_compare($main_str, $str, $offset, $length = NULL, $case_insensitivity = false) {
       $offset = (int) $offset;
       // Throw a warning because the offset is invalid
       if ($offset >= strlen($main_str)) {
           trigger_error('The start position cannot exceed initial string length.', E_USER_WARNING);
           return false;
       }
       // We are comparing the first n-characters of each string, so let's use the PHP function to do it
       if ($offset == 0 && is_int($length) && $case_insensitivity === true) {
           return strncasecmp($main_str, $str, $length);
       }
       // Get the substring that we are comparing
       if (is_int($length)) {
           $main_substr = substr($main_str, $offset, $length);
           $str_substr = substr($str, 0, $length);
       } else {
           $main_substr = substr($main_str, $offset);
           $str_substr = $str;
       }
       // Return a case-insensitive comparison of the two strings
       if ($case_insensitivity === true) {
           return strcasecmp($main_substr, $str_substr);
       }
       // Return a case-sensitive comparison of the two strings
       return strcmp($main_substr, $str_substr);
   }
}
?>


Change Language


Follow Navioo On Twitter
addcslashes
addslashes
bin2hex
chop
chr
chunk_split
convert_cyr_string
convert_uudecode
convert_uuencode
count_chars
crc32
crypt
echo
explode
fprintf
get_html_translation_table
hebrev
hebrevc
html_entity_decode
htmlentities
htmlspecialchars_decode
htmlspecialchars
implode
join
levenshtein
localeconv
ltrim
md5_file
md5
metaphone
money_format
nl_langinfo
nl2br
number_format
ord
parse_str
print
printf
quoted_printable_decode
quotemeta
rtrim
setlocale
sha1_file
sha1
similar_text
soundex
sprintf
sscanf
str_getcsv
str_ireplace
str_pad
str_repeat
str_replace
str_rot13
str_shuffle
str_split
str_word_count
strcasecmp
strchr
strcmp
strcoll
strcspn
strip_tags
stripcslashes
stripos
stripslashes
stristr
strlen
strnatcasecmp
strnatcmp
strncasecmp
strncmp
strpbrk
strpos
strrchr
strrev
strripos
strrpos
strspn
strstr
strtok
strtolower
strtoupper
strtr
substr_compare
substr_count
substr_replace
substr
trim
ucfirst
ucwords
vfprintf
vprintf
vsprintf
wordwrap
eXTReMe Tracker