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What happens when optional PHP function parameters are omitted?

What happens when optional PHP function parameters are omitted? (Computer science one · Optional & Default Parameters) — "Parameters in PHP functions are optio…

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Optional parameters in PHP functions are treated as null when omitted.
A function can be invoked without providing some parameters.
Each omitted parameter receives the value null.
In distance formula calculations, null values are treated as zero.
Example: getDistance(10.0, 20.0) provides only two arguments.
$x1 and $y1 take the values 10 and 20.
$x2 and $y2 become null and are treated as zero in the calculation.
Example: getDistance() provides no arguments.
All four parameters become null and are treated as zero in the calculation.

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What happens when optional PHP function parameters are omitted?

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Computer science one

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sam23

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"Parameters in PHP functions are optional. You can invoke a function without providing a subset of parameters. However, if a parameter is not provided, PHP will treat the parameter as null. If we invoked the getDistance() function with only two parameters: getDistance(10.0, 20.0); then inside the function, $x1 and $y1 would take on the values 10 and 20, but $x2 and $y2 would be null. When used in the distance formula calculations, both would be treated as zero. If we had invoked the function with no arguments, getDistance(); then all four parameters would be treated as null (and thus zero in the calculations)."

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