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<?php $mockCliente = array( 'pf' => array ( 'cpf' => '8028098711', 'nome' => 'Caio César' ) ); $padleftcount = 11 - strlen($mockCliente['pf']['cpf']); $mockCliente['pf']['cpf'] = str_pad($mockCliente['pf']['cpf'], $padleftcount, '0', STR_PAD_LEFT); var_dump($mockCliente);
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
array(1) { ["pf"]=> array(2) { ["cpf"]=> string(10) "8028098711" ["nome"]=> string(11) "Caio César" } }

preferences:
234.78 ms | 406 KiB | 355 Q