When running under PHP 5.4, certain operators are not valid #4688
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In Readme, Cacti 1.2.x support PHP 5.4+, so replace PHP 7.0 operator
??
with?:
Related to #4475 and #4662
These two errors are introduced after 1.2.19. CHANGELOG might be not required if @netniV recreate release/1.2.20 tag