substr_compare

Name:substr_compare

Category:String

Programming Language:php

One-line Description:Compare two strings from the specified starting position (binary safe and selective case sensitive).

Definition and usage

substr_compare() function compares two strings from the specified starting position.

Tip: This function is binary safe and selectively case sensitive.

Example

Example 1

Compare two strings:

 <?php
echo substr_compare ( "Hello world" , "Hello world" , 0 ) ;
?>

Try it yourself

Example 2

Compare two strings, when the start position for comparison in string1 is 6:

 <?php
echo substr_compare ( "Hello world" , "world" , 6 ) ;
?>

Try it yourself

Example 3

Use all parameters:

 <?php
echo substr_compare ( "world" , "or" , 1 , 2 ) ;
echo substr_compare ( "world" , "ld" , - 2 , 2 ) ;
echo substr_compare ( "world" , "orl" , 1 , 2 ) ;
echo substr_compare ( "world" , "OR" , 1 , 2 , TRUE ) ;
echo substr_compare ( "world" , "or" , 1 , 3 ) ;
echo substr_compare ( "world" , "rl" , 1 , 2 ) ;
?>

Try it yourself

Example 4

Different return values:

 <?php
echo substr_compare ( "Hello world!" , "Hello world!" , 0 ) ; // Two strings are equal
echo substr_compare ( "Hello world!" , "Hello" , 0 ) ; // string1 is greater than string2
echo substr_compare ( "Hello world!" , "Hello world! Hello!" , 0 ) ; // string1 is less than string2
?>

Try it yourself

grammar

 substr_compare ( string1 , string2 , startpos , length , case )

parameter	describe
string1	Required. Specifies the first string to be compared.
string2	Required. Specifies the second string to be compared.
startpos	Required. Specifies where to start the comparison in string1 . If it is a negative number, count starts from the end of the string.
length	Optional. Specifies how many characters in string1 are compared (number of characters).
case	Optional. Boolean value, specifying whether to perform case-sensitive comparisons: FALSE - Default. case sensitive TRUE - case insensitive