Yii rules验证中可以使用的占位符列表

Here’s a list of many placeholders and the validators that are using them:

• CBooleanValidator: {true} {false}
• CCaptchaValidator: {id}
• CCompareValidator: {compareAttribute} {compareValue} {operator}
• CExistValidator: {table} {column} {value}
• CFileValidator: {file} {limit} {extensions}
• CNumberValidator: {min} {max}
• CRequiredValidator: {value}
• CStringValidator: {min} {max} {length}
• CTypeValidator: {type}
• CUniqueValidator: {table} {column} {value}
• CUrlValidator: {schemes}

Of course, {attribute} is known in all validators. So, which placeholders are known depends on the validator and the condition as well: By default {min} is only used when the value is below the min value (as defined in rules) and {max} when the value is above the max value.