How can using non-strict comparison operators in PHP lead to errors in code logic?

Using non-strict comparison operators in PHP can lead to errors in code logic because they do not consider the data types of the operands being compared. This can result in unexpected behavior, especially when comparing variables of different types. To avoid these issues, it is recommended to use strict comparison operators (=== and !==) which also check the data types of the operands. 

// Incorrect comparison using non-strict operator
$var1 = 5;
$var2 = '5';

if($var1 == $var2){
    echo "Variables are equal";
} else {
    echo "Variables are not equal";
}

// Correct comparison using strict operator
$var1 = 5;
$var2 = '5';

if($var1 === $var2){
    echo "Variables are equal";
} else {
    echo "Variables are not equal";
}

Keywords

non-strict comparison operators PHP errors code logic type coercion

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