I would like to know how strcmp works in PHP, since I have a doubt as to the result it throws, I know that when it is compared and they are equal it will result in 0, but in other cases the result varies a bit (1, -1 , 5,45 etc.), which would be some examples in which the results vary with a brief explanation.
<?php
$variable1 = "walter";
$variable2 = "Alejandro";
$resultado = strcmp($variable1, $variable2);
var_dump($resultado);
?>
As indicated by PHP documentation :
Comparison of secure string at binary level
What does this mean?
The comparison will take into account different elements that can vary from one chain to the other, from a space to a capital .
How can we prove this?
Here's an example:
<?php
$cadena = "hola mundo";
$cadena_A = "hola";
$cadena_B = "hola mundo";
$cadena_C = "hola mundo cruel";
if(strcmp($cadena_A, $cadena) < 0){
print "$cadena_A es menor que $cadena\n";
}
if(strcmp($cadena_B, $cadena) == 0){
print "$cadena_A es igual que $cadena\n";
}
if(strcmp($cadena_C, $cadena) > 0){
print "$cadena_A es mayor que $cadena\n";
}
?>
If we execute the program, the result will be:
hola es menor que hola mundo
hola es igual que hola mundo
hola es mayor que hola mundo
Why did you return that result?
As indicated by PHP documentation :
Returns < 0 if str1 is less than str2; > 0 if str1 is greater than str2 and 0 if they are the same.
What do you mean?
A difference is made between the two chains, indicating a value, which will vary if the one has more or less text than the other string against which it is compared.