PHP

How to Convert MySQL to MySQLi PHP Code to Upgrade to PHP7 Doing the PHP MySQL MySQLi Migration

https://www.phpclasses.org/blog/package/9199/post/3-Smoothly-Migrate-your-PHP-Code-using-the-Old-MySQL-extension-to-MySQLi.html

This is my (very rough) method, search and replace in all .php and .inc files using Perl. To re-use my code, you HAVE to make modifications and take a backup of every .php and .inc file in case somwthing goes wrong.

I converted one project at a time, these commands were used for my Amiga user’s database, so some commands will reflect specific changes/searches I did in the code to find lines to change, I also did some mistakes and corrected those. Read the commands before you try these on your code:

find . -type f -name '*.php' -exec grep -l mysql_numrows {} \;
find . -type f -name '*.php' -exec perl -pi -e 's|mysql_numrows|mysqli_num_rows|g' {} \;
find . -type f -name '*.php' -exec perl -pi -e 's|mysql_num_rows|mysqli_num_rows|g' {} \;

find . -type f -name '*.php' -exec perl -pi -e 's|mysql_selectdb|mysqli_select_db|g' {} \;
find . -type f -name '*.php' -exec perl -pi -e 's|mysql_select_db|mysqli_select_db|g' {} \;
find . -type f -name '*.php' -exec grep mysqli_select_db {} \;
#
# Change to match your database name and the MySQL connection link (db name and calling parameters found above)
# Using mysql_select_db, the MySQL link identifier was optional, and sent as the second parameter
#  with mysqli_select_db it is required as a first parameter
#
find . -type f -name '*.php' -exec grep 'db("minimig_reg",\$link' {} \;
find . -type f -name '*.php' -exec grep 'db("minimig_reg")' {} \;
find . -type f -name '*.php' -exec perl -pi -e 's|db\("minimig_reg",\$link|db\(\$link,"minimig_reg"|g' {} \;
find . -type f -name '*.php' -exec perl -pi -e 's|db\("minimig_reg"\)|db\(\$link,"minimig_reg"\)|g' {} \;

#
# mysqli_connect returns the link identifier and also requires the database name as the fourth parameter, add it manually after this replacement
#
find . -type f -name '*.php' -exec grep mysql_connect {} \; 
find . -type f -name '*.php' -exec perl -pi -e 's|mysql_connect|mysqli_connect|g' {} \;  

find . -type f -name '*.php' -exec grep mysql_error {} \;    
find . -type f -name '*.php' -exec perl -pi -e 's|mysql_error()|mysqli_error(\$link)|g' {} \;
find . -type f -name '*.php' -exec perl -pi -e 's|mysqli_error\(\$link\)\(\)|mysqli_error\(\$link\)|g' {} \;

find . -type f -name '*.php' -exec grep mysql_insert {} \;
find . -type f -name '*.php' -exec perl -pi -e 's|mysql_insert_id\(\)|mysqli_insert_id\(\$link\)|g' {} \;

find . -type f -name '*.php' -exec grep mysql_query {} \;  
find . -type f -name '*.php' -exec perl -pi -e 's|mysql_query\(|mysqli_query\(\$link,|g' {} \;

find . -type f -name '*.php' -exec perl -pi -e 's|mysql_fetch_assoc|mysqli_fetch_assoc|g' {} \;

find . -type f -name '*.php' -exec grep mysql_fetch_array {} \;
find . -type f -name '*.php' -exec perl -pi -e 's|mysql_fetch_array\(\$result\)|mysqli_fetch_array\(\$result,MYSQLI_BOTH\)|g' {} \;
find . -type f -name '*.php' -exec perl -pi -e 's|mysql_fetch_array\(\$result_migs\)|mysqli_fetch_array\(\$result_migs,MYSQLI_BOTH\)|g' {} \;
find . -type f -name '*.php' -exec perl -pi -e 's|mysql_fetch_array\(\$result_info\)|mysqli_fetch_array\(\$result_info,MYSQLI_BOTH\)|g' {} \;

find . -type f -name '*.php' -exec grep mysql_real_escape_string {} \;
find . -type f -name '*.php' -exec perl -pi -e 's|mysql_real_escape_string\(|mysqli_real_escape_string\(\$link,|g' {} \;

find . -type f -name '*.php' -exec grep mysql_affected_rows {} \;
find . -type f -name '*.php' -exec perl -pi -e 's|mysql_affected_rows\(\)|mysqli_affected_rows\(\$link\)|g' {} \;

The include files (mostly the same command lines):

find . -type f -name '*.inc' -exec grep -l mysql_numrows {} \;
find . -type f -name '*.inc' -exec perl -pi -e 's|mysql_numrows|mysqli_num_rows|g' {} \;
find . -type f -name '*.inc' -exec perl -pi -e 's|mysql_num_rows|mysqli_num_rows|g' {} \;

find . -type f -name '*.inc' -exec perl -pi -e 's|mysql_selectdb|mysqli_select_db|g' {} \;
find . -type f -name '*.inc' -exec grep '"minimig_reg",\$link' {} \;   
find . -type f -name '*.inc' -exec perl -pi -e 's|"minimig_reg",\$link|\$link,"minimig_reg"|g' {} \;

find . -type f -name '*.inc' -exec grep mysql_connect {} \; 
find . -type f -name '*.inc' -exec perl -pi -e 's|mysql_connect|mysqli_connect|g' {} \;  

find . -type f -name '*.inc' -exec grep mysql_error {} \;    
find . -type f -name '*.inc' -exec perl -pi -e 's|mysql_error\(\)|mysqli_error\(\$link\)|g' {} \;

find . -type f -name '*.inc' -exec grep mysql_insert {} \;  
find . -type f -name '*.inc' -exec perl -pi -e 's|mysql_insert_id\(\)|mysqli_insert_id\(\$link\)|g' {} \;

find . -type f -name '*.inc' -exec grep mysql_query {} \;  
find . -type f -name '*.inc' -exec perl -pi -e 's|mysql_query\(|mysqli_query\(\$link,|g' {} \;

find . -type f -name '*.inc' -exec perl -pi -e 's|mysql_fetch_assoc|mysqli_fetch_assoc|g' {} \;

find . -type f -name '*.inc' -exec grep mysql_fetch_array {} \;  
find . -type f -name '*.inc' -exec perl -pi -e 's|mysql_fetch_array\(\$result\)|mysqli_fetch_array\(\$result,MYSQLI_BOTH\)|g' {} \;
find . -type f -name '*.inc' -exec perl -pi -e 's|mysql_fetch_array\(\$result_migs\)|mysqli_fetch_array\(\$result_migs,MYSQLI_BOTH\)|g' {} \;
find . -type f -name '*.inc' -exec perl -pi -e 's|mysql_fetch_array\(\$result_info\)|mysqli_fetch_array\(\$result_info,MYSQLI_BOTH\)|g' {} \;

find . -type f -name '*.inc' -exec grep mysql_real_escape_string {} \;
find . -type f -name '*.inc' -exec perl -pi -e 's|mysql_real_escape_string\(|mysqli_real_escape_string\(\$link,|g' {} \;

find . -type f -name '*.inc' -exec grep mysql_affected_rows {} \;
find . -type f -name '*.inc' -exec perl -pi -e 's|mysql_affected_rows\(\)|mysqli_affected_rows\(\$link\)|g' {} \;
find . -type f -name '*.inc' -exec perl -pi -e 's|mysql_result|mysqli_result|g' {} \;

find . -type f -name '*.inc' -exec grep split {} \;
find . -type f -name '*.inc' -exec perl -pi -e 's|split\(|explode\(|g' {} \;
find . -type f -name '*.php' -exec grep split {} \;

Missing function mysqli_result (to replace mysql_result)

function mysqli_result($res,$row=0,$col=0){
    $numrows = mysqli_num_rows($res);
    if ($numrows && $row <= ($numrows-1) && $row >=0){
        mysqli_data_seek($res,$row);
        $resrow = (is_numeric($col)) ? mysqli_fetch_row($res) : mysqli_fetch_assoc($res);
        if (isset($resrow[$col])){
            return $resrow[$col];
        }
    }
    return false;
}