Comparison of strings in php

This article introduces one or two character comparison methods in php: the number and the strcmp function for equal character string comparison. For more information, see. Use the strcmp () function string to compare intstrcmp (stringstr1, stringstr2 )).

This article introduces one or two character comparison methods in php: =, and strcmp for equal character string comparison. For more information, see.

Use strcmp () function strings for comparison

Int strcmp (string str1, string str2 ))

The str1 and str2 parameters define the two strings to be compared. if they are equal, 0 is returned. if str1 is greater than str2, the return value is greater than 0. if str1 is smaller than str2, the return value is smaller than 0.

The instance code is as follows:

2. $ Str1 = "a"; // defines a string constant
3. $ Str2 = "B"; // defines a string constant.
4. $ Str3 = "ccc"; // defines a string constant.
5. $ Str4 = "CCC"; // defines a string constant.
6. Echo strcmp ($ str1, $ str2); // The two strings are equal.
7. Echo strcmp ($ str3, $ str4); // note that this function is case sensitive.
8. ?>

Note: This function is case sensitive.

Use = for comparison

The code is as follows:

1. $ A = "joe ";
2. $ B = "jerry ";
3. If ($! = $ B)
4. {
5. Echo "not equal ";
6. }
7. Else
8. {
9. Echo "equal ";
10. }