如果在数组中没有找到消息，那么它也会返回2而不是null PHP - If no messages were found in array then also it is returning 2 instead of null PHP

If no messages were found in array then also it is returning 2 instead of null PHP

本文关键字：返回 PHP null 数组消息如果 | 更新日期: 2023-09-27

如果在数组中没有找到消息，则返回2而不是空的PHP

我正在将消息附加到数组，并调用函数来附加数组，但在调用函数时，在数组中找不到消息，它也将它们显示为2值，即数组（[0]=>[1]=>）

$errorMessages = array ();
    $isError = false;
    $middleName = $_POST [ 'middleName' ];
    $middleName = trim( stripslashes( $middleName ) );
    //validation for warrant id
    $warrantId = $_POST [ 'warrantId' ];
    if ( $warrantId == null || ( strlen( $warrantId ) ) <= 0 ) {
        $errorMessages[] = "Warrant Id is required";
    }  else {
        $message = 'enter keyboard characters only for warrant Id.';
        $warrantId = trim( stripslashes( $warrantId ) );
        $x = checkLength($warrantId, 'WarrantId', 1);
        $errorMessages[] = $x;
        //$errorMessages[] = checkRegEx( $warrantId, '/^([a-zA-Z0-9._'- #,^&`~<>:!@$(){}'"'';'*'[']?%| 'n 'r 't]*)$/', $message );
    }
    $errorMsg = count($errorMessages);
    print_r($errorMsg);

功能

/*
* Checks the field length is not greater than allowed length
* @params unknown values $fieldValue, $fieldName, $maxLength
* @return tables rows $rowResponse
*/
function checkLength($fieldValue, $fieldName, $maxLength) { 
    $errorMsg = NULL;
if (strlen ( $fieldValue ) > $maxLength) {
    $errorMsg = $fieldName . " cannot be greater than " . $maxLength . " characters.";
}   
return $errorMsg;   
}
/*
* Checks the given field value to match with regular expression or not
* @params unknown values $fieldValue, $mask, $message
* @return tables rows $rowResponse
*/
function checkRegEx($fieldValue, $regEx, $message) {
    $errorMsg = NULL;
if (! (preg_match ( $regEx, $fieldValue ))) {
    $errorMsg =  $message;
}
return $errorMsg;   
}

如果在数组中没有找到消息，那么它也会将其作为2 返回

checkLength和checkRegEx函数返回NULL并将其添加到数组中。只有在函数调用不返回NULL的情况下，才应分配函数调用的结果。

$x = checkLength($warrantId, 'WarrantId', 1);
if ($x !== NULL) {
    $errorMessages[] = $x;
}
$x = checkRegEx( $warrantId, '/^([a-zA-Z0-9._'- #,^&`~<>:!@$(){}'"'';'*'[']?%| 'n 'r 't]*)$/', $message );
if ($x !== NULL) {
    $errorMessages[] = $x;
}