Solution for php to generate an excel column with 26 or more columns greater than Z

Source: Internet
Author: User
Tags php excel
This article describes how to generate a php excel column name with more than 26 columns greater than Z. it is a perfect technique for using PHPExcel to generate an excel column with too many columns, it has some reference value. if you need it, you can refer to the example in this article to illustrate the solution when php generates an excel column name greater than 26 columns and greater than Z. Share it with you for your reference. The specific analysis is as follows:

All the generated excel files use the phpExcel class. here we will introduce the solution when the generated excel column name is greater than 26 columns and greater than Z. This is the method in the phpExcel class. I found it today, record the memo. the code is as follows:

The code is as follows:

Public static function stringFromColumnIndex ($ pColumnIndex = 0)
// Using a lookup cache adds a slight memory overhead, but boosts speed
// Caching using a static within the method is faster than a class static,
// Though it's additional memory overhead
Static $ _ indexCache = array ();

If (! Isset ($ _ indexCache [$ pColumnIndex]) {
// Determine column string
If ($ pColumnIndex <26 ){
$ _ IndexCache [$ pColumnIndex] = chr (65 + $ pColumnIndex );
} Elseif ($ pColumnIndex <702 ){
$ _ IndexCache [$ pColumnIndex] = chr (64 + ($ pColumnIndex/26). chr (65 + $ pColumnIndex % 26 );
} Else {
$ _ IndexCache [$ pColumnIndex] = chr (64 + ($ pColumnIndex-26)/676 )). chr (65 + ($ pColumnIndex-26) % 676)/26 )). chr (65 + $ pColumnIndex % 26 );
Return $ _ indexCache [$ pColumnIndex];

Use the following code to convert the number of a column to a letter:

The code is as follows:

PHPExcel_Cell: stringFromColumnIndex ($ I); // starts from o

Use the following code to convert a column's letters into numbers:

The code is as follows:

PHPExcel_Cell: columnIndexFromString ('A ');

I hope this article will help you with php programming.

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