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<?php function validateSenderName ($check) { $sender = array_shift($check); echo "Is $sender numeric?\n"; var_dump(is_numeric($sender)); if(is_numeric($sender)) { $valid = preg_match('/[0-9]{7,15}/', $sender); } else { $valid = preg_match('/[0-9a-z\-_\.&#\!]{3-11}/i', $sender); } return $valid; } //should all return true: var_dump(validateSenderName(['foo' => '0123456789012345'])); // 15 numbers var_dump(validateSenderName(['foo' => 'ABCDEFGHIJK'])); // 11 characters var_dump(validateSenderName(['foo' => '01234567'])); //7 numbers var_dump(validateSenderName(['foo' => 'ABC'])); //3 characters var_dump(validateSenderName(['foo' => '1ABC'])); //4 characters echo "--\n"; //should all return false: var_dump(validateSenderName(['foo' => 'ABCDEFGHIJKL'])); //12 chracters var_dump(validateSenderName(['foo' => '012345'])); //5 numbers var_dump(validateSenderName(['foo' => 'AB'])); //2 chracters var_dump(validateSenderName(['foo' => '01234567890123456'])); //16 numbers

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