strncasecmp

(PHP 4 >= 4.0.2, PHP 5, PHP 7)

strncasecmp Confronto sicuro con i testi binari, insensibile alle lettere maiuscole/minuscole sui primi n caratteri

Descrizione

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

Questa funzione è simile a strcasecmp(), con la differenza che si può indicare il numero dei caratteri (len) per ciascuna stringa che possono essere utilizzati per il confronto.

Restituisce < 0 if str1 se è minore di str2; > 0 se str1 è maggiore di str2, e 0 se sono uguali.

Vedere anche ereg(), strcasecmp(), strcmp(), substr(), stristr() e strstr().

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User Contributed Notes 2 notes

up
1
sazalach at gmail dot com
4 months ago
<?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
up
-35
saikumar dot msc at gmail dot com
1 year ago
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.
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