strcmp () and strcasecmp () function strings in PHP comparison usage analysis, strcmpstrcasecmp_php tutorial

strcmp () and strcasecmp () function strings in PHP compare usage analysis, strcmpstrcasecmp

The examples in this article describe the use of strcmp () and strcasecmp () function strings in PHP. Share to everyone for your reference, as follows:

One, PHP strcmp () function is used to compare two strings (case-sensitive), which is defined as follows:

strcmp (STRING1,STRING2)

Parameter description:

String1 required. Specifies the first string to compare.
string2 required. Specifies a second string to compare.

PS: Thestrcmp () function is similar to the strncmp () function, unlike the STRNCMP () can specify the number of characters each string is used to compare.

Second, PHP strcasecmp () function compares two strings (case-insensitive), which is defined as follows:

STRCASECMP (STRING1,STRING2)

Parameter description:

String1 required. Specifies the first string to compare.
string2 required. Specifies a second string to compare.

PS: Thestrcasecmp () function is similar to the strncasecmp () function, unlike the STRNCASECMP () can specify the number of characters each string is used to compare.

Example code:

<?php $str 1 = "Home for the guests"; $str 2 = "Home for the guests"; $str 3= "Www.jb51.net"; $str 4= "WWW.JB51.NET"; Echo strcmp ($str 1, $str 2);//Two strings equal echo "
"; Echo strcmp ($str 3, $str 4);//Note that the function is case-sensitive, echo "
"; Echo strcasecmp ($str 3, $str 4);//The function is case-insensitive?>

The results of the operation are as follows:

010

Add: Questions about return values

For comparison of parameter string1 and string2:

If two strings are equal, the return value is 0
If string1 is less than string2, the return value is less than 0
If string1 is greater than string2, the return value is greater than 0

I hope this article is helpful to you in PHP programming.

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