How to save base64 encoding to local file in php?

1. Use C to base64 encode an image locally and submit it to the web server through post. After base64_decode decoding by PHP, the image is not correct after saving. Use a hexadecimal editor to view and compare the source file (local source file image), and find that the 0d--carriage return character is missing after saving.

The problem experienced during the

2. process is that the data taken out after post transmission_POST['data'] is compared with the previous base64-encoded data number and becomes a space. Use PHP's str_replace(...) to replace it back to the original one. It can Make sure there is no problem with this.

After

3. is decoded by $img = base64_decode(...), the length of the returned strlen($img) is the same as the length of the source file. Whether using for(...) fwrite(...); or file_put_contents(...), the byte 0d is lost

To be resolved: see title

Solved: There was a problem when opening the file stream, the process was correct

Reply content:

1. Use C to base64 encode an image locally and submit it to the web server through post. After base64_decode decoding by PHP, the image is not correct after saving. Use a hexadecimal editor to view and compare the source file (local source file image), and find that the 0d--carriage return character is missing after saving.

2. The problem experienced during the process is that the data taken out after post transmission_POST['data'] is compared with the previous base64-encoded data number and becomes a space. Use PHP's str_replace(...) to replace it back to the original one. It can Make sure there is no problem with this.

After

3. is decoded by $img = base64_decode(...), the length of the returned strlen($img) is the same as the length of the source file. Whether using for(...) fwrite(...); or file_put_contents(...), the byte 0d is lost

To be resolved: see title

Solved: There was a problem when opening the file stream, the process was correct

You can directly output this image on the web to see if it can be displayed normally, similar to <img src="data:image/png;base64, here is the base64 code" />