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| rfc:calltimebyref [2008/05/21 13:08] – sfox | rfc:calltimebyref [2008/05/21 13:29] – sfox |
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| This RFC aims to clarify the situation with call-time pass-by-ref in PHP 5.3. | This RFC aims to clarify the situation with call-time pass-by-ref in PHP 5.3. |
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| </code> | </code> |
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| In fact, allowing return values by reference is the default behaviour in PHP, and has been from PHP 4.0 beta right up to PHP 5.3. | In fact, allowing values to be passed by reference is the default behaviour in PHP, and has been from PHP 4.0 beta right up to PHP 5.3. |
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| ===== Reality Check ===== | ===== Reality Check ===== |
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| In some circumstances, on some platforms, returning values by reference can actually speed up your code. In most cases, though - and for all when it comes to large arrays - it carries a performance penalty. If you make use of by-ref for performance reasons on a given platform, that optimization will not be portable. | In some circumstances, on some platforms, passing values by reference can actually speed up your code. In most cases, though - and for all when it comes to large arrays - it carries a performance penalty. If you make use of by-ref for performance reasons on a given platform, that optimization will not be portable. |
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| ===== Future ===== | ===== Future ===== |
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| The directive is completely gone from CVS HEAD [3]. The effect of this originally was that a new-to-many ''E_STRICT'' would be thrown when values are returned by reference. However, it's been moved to ''E_DEPRECATED'' recently. In either case, it will no longer be possible to turn the warning off. | The directive is completely gone from CVS HEAD [3]. The effect of this originally was that a new-to-many ''E_STRICT'' would be thrown when values are passed by reference. However, it's been moved to ''E_DEPRECATED'' recently. In either case, it will no longer be possible to turn the warning off. |
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| ===== Proposal ===== | ===== Proposal ===== |