What is the difference between using AND and OR logical operators in PHP validation functions, and how does it impact form validation and error handling?

When using AND logical operators in PHP validation functions, all conditions must be met for the validation to pass. On the other hand, when using OR logical operators, any of the conditions being true will result in the validation passing. This impacts form validation as it allows for different validation scenarios based on the logical operator used. Example PHP code snippet: 

// Using AND logical operator for form validation
if($username != '' && $password != ''){
   // Validation passed
}else{
   // Validation failed
}

// Using OR logical operator for form validation
if($email != '' || $phone != ''){
   // Validation passed
}else{
   // Validation failed
}

Keywords

PHP logical operators form validation error handling validation functions

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