How can the use of switch statements in PHP lead to unexpected errors like T_CASE?

Switch statements in PHP can lead to unexpected errors like T_CASE when the cases are not properly terminated with a break statement. This can cause the code execution to "fall through" to the next case, leading to unintended behavior. To solve this issue, always remember to include a break statement at the end of each case to prevent this from happening.

switch ($variable) {
    case 'value1':
        // code to be executed if variable equals value1
        break;
    case 'value2':
        // code to be executed if variable equals value2
        break;
    default:
        // code to be executed if variable does not match any case
}