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PHP
I’m currently upgrading a large codebase to PHP 8.0. Here’s some documentation from the process to refactor the codebase to use a modern PHP approach.
Using array_key_exists() on objects is deprecated.
array_key_exists no longer supports checking for properties defined within an object... instead use property_exists
Note: The arguments are swapped.
Each() deprecated
To replace each () deprecations you just use a foreach() loop:
while (list ($key, $val) = each ($_POST['selected'])) {
becomes
foreach ($_POST['selected'] as $key => $val) {
Required parameter $x follows optional parameter $y
PHP wants you to put required arguments first as parameters before optional arguments when defining a function’s argument list.
MYSQL → MSQLI Port
mysql_fetch_array → mysqli_fetch_arraymysql_num_rows → mysqli_num_rowsmysql_num_fields → mysqli_num_fieldsmysql_fetch_row → mysqli_fetch_rowmysql_real_escape_string → mysqli_real_escape_stringmysql_fetch_assoc → mysqli_fetch_assocmysql_query → mysqli_querymysql_insert_id → mysqli_insert_idmysql_field_name → no replacement function, must be custom written, see https://stackoverflow.com/questions/14629636/mysql-field-name-to-the-new-mysqlimysql_connect → mysqli_connect mysql_select_db → mysqli_select_db mysqli_query arguments are reversed. Go through each instance and reverse them!mysql_close → mysqli_closemysql_free_result