I had the same issue. With a lot of logging, I found out, that the attachments array in
wp-content/plugins/contact-form-7/includes/mail.php
have not the format as expected in
/wp-includes/pluggable.php
The indexes of the array were integers, instead of strings. The logging, I added looked like
$res = file_put_contents('/mypath/mail.log', date('Y-m-d H:i:s') . " [521] attachments: $attachments[0]\n", FILE_APPEND);
if ( ! empty( $attachments ) ) {
foreach ( $attachments as $filename => $attachment ) {
$filename = is_string( $filename ) ? $filename : '';
$res = file_put_contents('/mypath/mail.log', date('Y-m-d H:i:s') . " [526] $filename: $filename\n", FILE_APPEND);
try {
$phpmailer->addAttachment( $attachment, $filename );
$res = file_put_contents('/mypath/mail.log', date('Y-m-d H:i:s') . " phpmailer->addAttachment: $filename\n", FILE_APPEND);
} catch ( PHPMailer\PHPMailer\Exception $e ) {
$res = file_put_contents('/mypath/mail.log', date('Y-m-d H:i:s') . " phpmailer->addAttachment: $filename\n", FILE_APPEND);
continue;
}
}
the result:
2024-07-31 15:39:10 [521] attachments: /mypath/wp-content/uploads/wpcf7_uploads/0043706875/pech.png
2024-07-31 15:39:10 [526] :
I re-wrote the attachments function:
private function attachments( $template = null ) {
if ( ! $template ) {
$template = $this->get( 'attachments' );
}
$attachments = array();
if ( $submission = WPCF7_Submission::get_instance() ) {
$uploaded_files = $submission->uploaded_files();
foreach ( (array) $uploaded_files as $name => $paths ) {
if ( false !== strpos( $template, "[{$name}]" ) ) {
foreach ((array) $paths as $path) {
if ( file_exists( $path ) ) {
$attachments[basename($path)] = $path;
}
}
}
}
}
foreach ( explode( "\n", $template ) as $line ) {
$line = trim( $line );
if ( '' === $line or '[' == substr( $line, 0, 1 ) ) {
continue;
}
$full_path = path_join( WP_CONTENT_DIR, $line );
if ( file_exists( $full_path ) ) {
$attachments[basename($full_path)] = $full_path;
}
}
if ( $submission = WPCF7_Submission::get_instance() ) {
foreach ((array) $submission->extra_attachments( $this->name ) as $extra_attachment) {
if ( file_exists( $extra_attachment ) ) {
$attachments[basename($extra_attachment)] = $extra_attachment;
}
}
}
return $attachments;
}
Then, the attachments were there (in pluggable.php):
2024-07-31 16:07:16 [525] filename type: string filename value: pech.png, attachment: /mypath/wp-content/uploads/wpcf7_uploads/0256448928/pech.png
2024-07-31 16:07:16 [527] pech.png: pech.png
2024-07-31 16:07:16 [531] phpmailer->addAttachment: /mypath/wp-content/uploads/wpcf7_uploads/0256448928/pech.png
At the end, the phpmailer wouldn’t attach the files anyway, but that’s an issue of the php installation, I use.
I switched to smtp, which worked fine. I also could undo all my changes to the attachment function.
So, my recommendation is to use smtp or look at the attachments array which is processed in pluggable.php in line 521 to 531.
Best of luck, Stephan
