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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 |
---|---|
1113 | if ( !is_string($value) && !is_numeric($value) ) |
1114 | return $value; |
1115 |
|
1116 | $prefixed = false !== strpos( $field, 'user_' ); |
1117 |
|
1118 | if ( 'edit' == $context ) { |
1119 | if ( $prefixed ) { |
1120 | $value = apply_filters("edit_{$field}", $value, $user_id); |
1121 | } else { |
1122 | $value = apply_filters("edit_user_{$field}", $value, $user_id); |
1123 | } |
1124 |
|
1125 | if ( 'description' == $field ) |
1126 | $value = esc_html( $value ); // textarea_escaped? |
1127 | else |
1128 | $value = esc_attr($value); |
1129 | } else if ( 'db' == $context ) { |
1130 | if ( $prefixed ) { |
1131 | $value = apply_filters("pre_{$field}", $value); |