April 2026
Intermediate
1009 pages
34h 15m
English
Content preview from PHP and MySQL
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1.5 The Most Important Features in PHP 7.3
As with previous versions, PHP 7.3 does not contain any groundbreaking changes compared to the previous 7 versions. However, some incompatibilities should be noted, and some new functions may be helpful:
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From PHP 7.0 to 7.1, the handling of "empty" returns for functions has been changed. If the return value is typed with a ? in front of the data type, then a return of zero is also possible. However, if the return value is specified as void, returns with zero are not permitted.
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Since PHP 7.1, the array abbreviation with [] can also be used as a basis in foreach, for example. This variant still exists alongside list(). Also since PHP 7.1, both the shorthand notation and list() allow the use of ...
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