strncasecmp

(PHP 4 >= 4.0.2, PHP 5)

strncasecmpBinary safe case-insensitive string comparison of the first n characters

Description

int strncasecmp ( string $str1 , string $str2 , int $len )

This function is similar to strcasecmp(), with the difference that you can specify the (upper limit of the) number of characters from each string to be used in the comparison.

Parameters

str1

The first string.

str2

The second string.

len

The length of strings to be used in the comparison.

Return Values

Returns < 0 if str1 is less than str2; > 0 if str1 is greater than str2, and 0 if they are equal.

See Also

  • strncmp() - Binary safe string comparison of the first n characters
  • preg_match() - Perform a regular expression match
  • substr_compare() - Binary safe comparison of two strings from an offset, up to length characters
  • strcasecmp() - Binary safe case-insensitive string comparison
  • stristr() - Case-insensitive strstr
  • substr() - Return part of a string

Коментарии

Example:
<?php
$string 
“true”;
if(
strncasecmp($string“Trudeau”4)) { print “True”; } else { print "False" }
?>

If we look at above example, immediately we will say the final output will be 'False', but that's not real. 

Method "strncasecmp()" returns 1 because the first four characters of ‘Trud’ come before the first four characters of "true" when sorted not case sensitively.
2014-06-01 18:26:11
http://php5.kiev.ua/manual/ru/function.strncasecmp.html
<?php
$str1 
"red";
$str2 "redent";
$test=strncasecmp($str1$str2 3); 
if (
$str1==$str2)
{
echo 
"$test"

else 

echo 
"$test;
}
?>

if we run the above script then we will get return 0, because first string $str1 = "red" and second $str2 = "redent" but in comparison i have set the first three character will try to match. as per condition if two string are equal then it will return 0. But in below example it will return greater than 0 because here is str1 is greater than str2.

<?php
$str1 
"redmyshirt";
$str2 "redent";
$test=strncasecmp($str1$str2 4); 
if (
$str1==$str2)
{
echo 
"$test"

else 

echo 
"$test;
}
?>

as same if we run the below script it will return -1 because str1 is less than str2.

<?php
$str1 
"red";
$str2 "redent";
$test=strncasecmp($str1$str2 4); 
if (
$str1==$str2)
{
echo 
"$test"

else 

echo 
"$test;
}
?>

ya..i think its easy to understand
2015-12-16 01:14:59
http://php5.kiev.ua/manual/ru/function.strncasecmp.html

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