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| rfc:strict_operators:faq [2020/07/06 14:56] – switch is not affected jasny | rfc:strict_operators:faq [2020/07/06 14:59] – jasny |
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| Both the concatenation operator and arithmetic operators throw a ''%%TypeError%%'' for arrays, resources, and objects. Casting these to a string or int/float doesn't give a proper representation of the value of the operand. | Both the concatenation operator and arithmetic operators throw a ''%%TypeError%%'' for arrays, resources, and objects. Casting these to a string or int/float doesn't give a proper representation of the value of the operand. |
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| Using a boolean or null as operand for both concatenation and arithmetic operators also throws a ''%%TypeError%%''. In most cases, the use of a boolean or null indicates an error as many functions return ''%%false%%'' or ''%%null%%'' in case of an error or when no result can be returned. This is different from the function returning an empty string or ''%%0%%''. [[https://php.net/strpos|''%%strpos%%'']] is a well-known example. | Using a boolean or null as operand for both concatenation and arithmetic operators also throws a ''%%TypeError%%''. In most cases, the use of a boolean or null indicates an error as many functions return ''%%false%%'' or ''%%null%%'' in case of an error or when no result can be returned. This is different from the function returning an empty string or ''%%0%%''. [[https://php.net/strpos|strpos]] is a well-known example. |
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| ==== Will comparing a number to a numeric string work with strict_operators? ==== | ==== Will comparing a number to a numeric string work with strict_operators? ==== |
| Changing ''switch'' to compare using ''==='' would change the behavior based on the directive. | Changing ''switch'' to compare using ''==='' would change the behavior based on the directive. |
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| To use strict comparison, most ''switch'' statements can be rewritten to [[https://wiki.php.net/rfc/match_expression_v2|''match'' statements]. | To use strict comparison, most ''switch'' statements can be rewritten to [[https://wiki.php.net/rfc/match_expression_v2|match statements]]. |
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| ==== Are there cases where a statement doesn't throw a TypeError but yields a different result? ==== | ==== Are there cases where a statement doesn't throw a TypeError but yields a different result? ==== |