If the primary key is composite, concatenate the columns of the primary key together (optionally separated by a delimiter).A MySQL BIGINT field allocates 64 bits (8 bytes) of space for each value. Create a new column on the table, of type BIGINT.Remove the legacy primary key index from the table.A solution called hashing! Here's what I've come up with: This would effectively make Migrate's ID mapping tables corrupt.Ī better solution is needed. Auto-increment IDs would, therefore, correspond to different composite legacy primary keys each time I re-imported the data. Records may have been deleted upstream, or new records may have been added in between other old records. And every time I do this, the auto-incrementing primary keys that get generated could be different. In my project, I'm going to have to re-import the legacy data at regular intervals, by deleting and re-creating all the legacy tables. But this solution has a serious drawback. This would provide the primary key information that Migrate needs in order to do its mapping of legacy IDs to Drupal IDs. The simplest solution to this problem would be to add an auto-incrementing integer primary key column to the legacy tables. the key is a combination of two or more columns), or non-integer (i.e. Unfortunately, most of the tables I'm working with have primary keys that are either composite (i.e. Migrate is a great tool for the job, but one of its limitations is that it requires the legacy database tables to have non-composite integer primary keys. I'm importing a large amount of legacy data into Drupal, using the awesome Migrate module (and friends). I have an interesting problem, on a data migration project I'm currently working on. In this PHP Tutorial, we learned how to convert a string to int using type-casting or intval() function.Generating unique integer IDs from strings in MySQL In the following example, we take a string value in $x with integer content, and convert this string into an integer value using intval() function.Īs observed in the type casting method, with intval() function value as well, you get the integer part even if the string contains some decimal point number. The syntax to use intval() to convert string to int is $int_value = intval( $string ) Example The function will return the integer value corresponding to the string content. To convert string to integer using PHP intval() built-in function, pass the string as argument to the function. Output Convert String to Int using intval() Then typecast this string to integer and observe the output. In the following program, we take a string $x which contains some decimal value. If the string contains a floating value, then the type casting trims out the decimal part. In the following program, we take a string with integer content, and convert the string into integer using type casting. Add specific number of days to given date.Find number of days between two given dates.Catch multiple exceptions in a single catch block.Uncaught Error: Cannot access protected property.Define property and method with same name in class.Delete value at specific index in array.Filter elements in array based on a condition.Combine two arrays to create an Associative Array.Find index of last occurrence of value in array.Count occurrences of specific value in array.Iterate over key-value pairs using foreach.Check if any two adjacent values are same.Check if specific element is present in array.PHP – Convert string array to CSV string.Check if string has a match for regular expression.Check if entire string matches a regular expression.Find all the substrings that match a pattern.Find index of last occurrence in a string.Count number of occurrences of substring in a string. ![]() Join elements of string array with separator string.Split string into substrings of specified length.Split string by one or more whitespace characters.Split string by any whitespace character.Trim specific characters from edges of the string.Insert substring at specific index in string.Insert character at specific index in string.Check if string value is a valid number.Check if string contains only uppercase. ![]() ![]()
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