CakePHP-验证



通常在制作网站时,我们需要先验证某些内容,然后再进一步处理数据。 CakePHP提供了验证包,以构建可以轻松验证数据的验证器。

验证方法

CakePHP在Validation类中提供了各种验证方法。下面列出了其中一些最受欢迎的内容。

Syntax

Add(string $field, array|string $name, array|Cake\Validation\ValidationRule $rule [] )

Parameters
  • The name of the field from which the rule will be added.

  • The alias for a single rule or multiple rules array.

  • The rule to add

Returns

$this

Description

Adds a new rule to a field’s rule set. If second argument is an array, then rules list for the field will be replaced with second argument and third argument will be ignored.

Syntax

allowEmpty(string $field, boolean|string|callable $whentrue, string|null $messagenull)

Parameters
  • The name of the field.

  • Indicates when the field is allowed to be empty. Valid values are true (always), ‘create’, ‘update’. If a callable is passed, then the field will be left empty only when the callback returns true.

  • The message to show if the field is not.

Returns $this
Description

Allows a field to be empty.

Syntax

alphanumeric (string $field, string|null $messagenull, string|callable|null $whennull)

Parameters
  • The field you want to apply the rule to.

  • The error message when the rule fails.

  • Either ‘create’ or ‘update’ or a callable that returns true when the validation rule should be applied.

Returns

$this

Description

Add an alphanumeric rule to a field.

Syntax

creditCard(string $field , string $type‘all’, string|null $messagenull, string|callable|null $whennull)

Parameters
  • The field you want to apply the rule to.

  • The type of cards you want to allow. Defaults to ‘all’. You can also supply an array of accepted card types, for example, [‘mastercard’, ‘visa’, ‘amex’].

  • The error message when the rule fails.

  • Either ‘create’ or ‘update’ or a callable that returns true, when the validation rule should be applied.

Returns

$this

Description

Add a credit card rule to a field.

Syntax

Email(string $field , boolean $checkMXfalse, string|null $messagenull, string|callable|null, $whennull)

Parameters
  • The field you want to apply the rule to.

  • Whether or not to check the MX records.

  • The error message when the rule fails.

  • Either ‘create’ or ‘update’ or a callable that returns true, when the validation rule should be applied.

Returns

$this

Description

Add an email validation rule to a field.

Syntax

maxLength(string $field, integer $max, string|null $messagenull, string|callable|null $whennull)

Parameters
  • The field you want to apply the rule to.

  • The maximum length allowed.

  • The error message when the rule fails.

  • Either ‘create’ or ‘update’ or a callable that returns true when the validation rule should be applied.

Returns

$this

Description

Add a string length validation rule to a field.

Syntax

minLength(string $field, integer $min, string|null $messagenull, string|callable|null $whennull)

Parameters
  • The field you want to apply the rule to.

  • The maximum length allowed.

  • The error message when the rule fails.

  • Either ‘create’ or ‘update’ or a callable, that returns true when the validation rule should be applied.

Returns

$this

Description

Add a string length validation rule to a field.

Syntax

notBlank(string $field, string|null $messagenull, string|callable|null $whennull)

Parameters
  • The field you want to apply the rule to.

  • The error message when the rule fails.

  • Either ‘create’ or ‘update’ or a callable that returns true when the validation rule should be applied.

Returns

$this

Description

Add a notBlank rule to a field.

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