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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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177 |
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178 | /** |
179 | * Filters the wp_mail() arguments. |
180 | * |
181 | * @since 2.2.0 |
182 | * |
183 | * @param array $args A compacted array of wp_mail() arguments, including the "to" email, |
184 | * subject, message, headers, and attachments values. |
185 | */ |
186 | $atts = apply_filters( 'wp_mail', compact( 'to', 'subject', 'message', 'headers', 'attachments' ) ); |
187 |
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188 | if ( isset( $atts['to'] ) ) { |
189 | $to = $atts['to']; |
190 | } |
191 |
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192 | if ( ! is_array( $to ) ) { |
193 | $to = explode( ',', $to ); |
194 | } |
195 |
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