How to Combine Multiple CSV Files In PHP?

Best CSV File Handling Tools to Buy in October 2025

1

Patriot Products CSV-3090B Gas Wood Chipper Leaf Shredder

• 9 HP BRIGGS ENGINE DELIVERS IMPRESSIVE CHIPPING POWER!
• EFFORTLESSLY CHIP 3-INCH BRANCHES INTO COIN-SIZED CHIPS!
• DURABLE DESIGN ENSURES LONGEVITY AND RELIABLE PERFORMANCE!

BUY & SAVE

$1,825.00

2

Schlage F10 CSV ELA 626 Commercial Series Elan Door Lever, Hall & Closet Passage Lock, Satin Chrome

• IDEAL FOR INTERIOR DOORS; NON-LOCKING FOR EASY ACCESS ANYWHERE.
• HASSLE-FREE INSTALLATION IN MINUTES WITH INCLUDED TOOLS AND PARTS.
• CERTIFIED DURABILITY: GRADE 2/AAA FOR SECURITY AND LONG-LASTING USE.

BUY & SAVE

$33.75

3

Klutch Cross-Slide Drill Press Vise, 4in. Jaw Width, Model# AT-CSV-04

• VERSATILE CLAMPING WITH DUAL SWIVEL CRANK HANDLES FOR PRECISION.
• SECURE POSITION WITH SET SCREWS FOR ACCURATE DRILLING EVERY TIME.
• CAST IRON BUILD AND 4 MOUNTING SLOTS FIT MOST DRILL PRESSES.

BUY & SAVE

$119.99

4

VDIAGTOOL Bidirectional Scan Tool VD70 Lite, OBD2 Scanner Diagnostic Tool with 31+ Resets, 2025 Scanner for Car, Full System Scan, CAN FD & DoIP, Free Update

• BUDGET-FRIENDLY OBD2 SCANNER UNDER $300 WITH ADVANCED FEATURES.

• FULL BI-DIRECTIONAL CONTROL FOR 4000+ ACTIVE TESTS AND REPAIRS.

• BROAD VEHICLE COVERAGE WITH 31+ RESETS FOR EFFICIENT MAINTENANCE.

BUY & SAVE

$299.98 $399.00

Save 25%

5

Schlage F10 CSV ORB 626 Commercial Series Orbit Door Knob, Hall & Closet Passage Lock, Satin Chrome

• EFFORTLESS INSTALL WITH SELF-ALIGNING SCREWS; UPGRADES IN MINUTES!
• DURABLE, CERTIFIED METAL DESIGN ENSURES LONG-LASTING SECURITY.
• UNIVERSAL FIT FOR STANDARD DOORS; FLEXIBLE FACEPLATE OPTIONS INCLUDED.

BUY & SAVE

$22.79 $27.99

Save 19%

6

Schlage F40 CSV ORB 626 Commercial Series Orbit Door Knob, Bed & Bath Privacy Lock, Satin Chrome

• PERFECT FOR PRIVACY: IDEAL FOR BEDROOMS AND BATHROOMS WITH PUSH-BUTTON LOCK.
• EASY DIY INSTALLATION: HASSLE-FREE SETUP WITH INCLUDED TOOLS IN MINUTES!
• UNMATCHED DURABILITY: PREMIUM METAL, GRADE 2 CERTIFIED FOR STRENGTH & SECURITY.

BUY & SAVE

$22.79 $27.99

Save 19%

+

ONE MORE?

To combine multiple CSV files in PHP, you can follow these steps:

1. Open a new CSV file in write mode using the fopen function and set the mode to append the content (a+). $combinedFile = fopen('combined.csv', 'a+');
2. Iterate through each CSV file that you want to combine using a loop. $filePaths = ['file1.csv', 'file2.csv', 'file3.csv']; foreach ($filePaths as $filePath) { // Read the content of the CSV file $file = fopen($filePath, 'r'); // Iterate through each line of the file while (($line = fgetcsv($file)) !== false) { // Write the line into the combined CSV file fputcsv($combinedFile, $line); } // Close the file fclose($file); }
3. Finally, close the combined CSV file. fclose($combinedFile);

By following these steps, you will be able to combine multiple CSV files into one using PHP.

What is the easiest way to combine multiple CSV files in PHP?

The easiest way to combine multiple CSV files in PHP is by using the fopen() and fwrite() functions to read data from each source file and write it into a single target file. Here's an example:

$files = ['file1.csv', 'file2.csv', 'file3.csv']; $targetFile = 'combined.csv';

$fp = fopen($targetFile, 'w');

foreach ($files as $file) { if (($handle = fopen($file, 'r')) !== false) { while (($data = fgetcsv($handle)) !== false) { fputcsv($fp, $data); } fclose($handle); } }

fclose($fp);

In this example, an array $files is created with the names of the CSV files to be combined. The variable $targetFile stores the name of the output file.

The code uses a foreach loop to iterate over each file. It then opens the file using fopen() in read mode ('r'). It uses a while loop to read each row of the CSV file using fgetcsv() and writes it to the target file using fputcsv(). Finally, the source file is closed with fclose().

After all the files have been processed, the target file is closed with fclose(). The resulting file will contain the combined data from all the CSV files.

How do I merge CSV files into one using PHP?

To merge multiple CSV files into one using PHP, you can follow these steps:

1. Define an array to store the file paths of the CSV files you want to merge.

$csvFiles = [ 'file1.csv', 'file2.csv', 'file3.csv' ];

1. Create an output file to store the merged data.

$outputFile = 'merged.csv'; $handle = fopen($outputFile, 'w');

1. Iterate over each CSV file, open it, and copy its content into the output file.

foreach ($csvFiles as $csvFile) { $handleCsv = fopen($csvFile, 'r');

// Skip the header row in subsequent files (optional)
if ($csvFile !== $csvFiles\[0\]) {
    fgetcsv($handleCsv);
}

while (($data = fgetcsv($handleCsv)) !== false) {
    fputcsv($handle, $data);
}

fclose($handleCsv);

}

1. Close the output file.

fclose($handle);

Once you have implemented these steps, the CSV files specified in the $csvFiles array will be merged into one file called merged.csv.

Note: Make sure the PHP script has write permissions in the folder where the merged file is being created.

What PHP function can I use to merge multiple CSV files?

You can use the fputcsv() function in PHP to merge multiple CSV files. Here's an example of how you can do it:

function mergeCSVFiles($outputFile, $inputFiles) { $output = fopen($outputFile, 'w');

foreach ($inputFiles as $file) { $input = fopen($file, 'r');

while (($data = fgetcsv($input)) !== false) {
  fputcsv($output, $data);
}

fclose($input);

}

fclose($output); }

// Usage $inputFiles = [ 'file1.csv', 'file2.csv', 'file3.csv' ];

mergeCSVFiles('output.csv', $inputFiles);

In this example, the mergeCSVFiles() function takes the output file name and an array of input file names as parameters. It then opens each input file one by one, reads the data row by row using fgetcsv(), and writes the data into the output file using fputcsv(). Finally, it closes all the file handles.

How can I merge CSV files with different delimiters in PHP?

To merge CSV files with different delimiters in PHP, you can follow these steps:

1. Initialize an array to store the merged data.

$mergedData = [];

1. Read each CSV file and store their content in the array.

$csvFiles = ["file1.csv", "file2.csv", "file3.csv"];

foreach ($csvFiles as $file) { $delimiter = detectDelimiter($file); // Function to detect delimiter based on file content

if (($handle = fopen($file, "r")) !== FALSE) {
    while (($data = fgetcsv($handle, 0, $delimiter)) !== FALSE) {
        $mergedData\[\] = $data;
    }
    fclose($handle);
}

}

1. Write the merged data to a new CSV file.

$mergedFile = "merged.csv";

if (($handle = fopen($mergedFile, "w")) !== FALSE) { foreach ($mergedData as $data) { fputcsv($handle, $data); } fclose($handle); }

Note: The detectDelimiter() function is not specified in the code snippet above. You can implement it based on your needs, such as checking the content of each file to determine the delimiter used.