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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
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183 | * Array of the `wp_mail()` arguments. |
184 | * |
185 | * @type string|string[] $to Array or comma-separated list of email addresses to send message. |
186 | * @type string $subject Email subject. |
187 | * @type string $message Message contents. |
188 | * @type string|string[] $headers Additional headers. |
189 | * @type string|string[] $attachments Paths to files to attach. |
190 | * } |
191 | */ |
192 | $atts = apply_filters( 'wp_mail', compact( 'to', 'subject', 'message', 'headers', 'attachments' ) ); |
193 |
|
194 | /** |
195 | * Filters whether to preempt sending an email. |
196 | * |
197 | * Returning a non-null value will short-circuit {@see wp_mail()}, returning |
198 | * that value instead. A boolean return value should be used to indicate whether |
199 | * the email was successfully sent. |
200 | * |
201 | * @since 5.7.0 |