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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 |
|---|---|
| 116 | /** |
| 117 | * Fires before the password and confirm password fields are checked for congruity. |
| 118 | * |
| 119 | * @since 1.5.1 |
| 120 | * |
| 121 | * @param string $user_login The username. |
| 122 | * @param string &$pass1 The password, passed by reference. |
| 123 | * @param string &$pass2 The confirmed password, passed by reference. |
| 124 | */ |
| 125 | do_action_ref_array( 'check_passwords', array( $user->user_login, &$pass1, &$pass2 ) ); |
| 126 | |
| 127 | // Check for blank password when adding a user. |
| 128 | if ( ! $update && empty( $pass1 ) ) { |
| 129 | $errors->add( 'pass', __( '<strong>ERROR</strong>: Please enter a password.' ), array( 'form-field' => 'pass1' ) ); |
| 130 | } |
| 131 | |
| 132 | // Check for "\" in password. |
| 133 | if ( false !== strpos( wp_unslash( $pass1 ), "\\" ) ) { |
| 134 | $errors->add( 'pass', __( '<strong>ERROR</strong>: Passwords may not contain the character "\\".' ), array( 'form-field' => 'pass1' ) ); |