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Output for 8.2.0 - 8.2.28, 8.3.0 - 8.3.19, 8.4.1 - 8.4.5
Deprecated: Using ${var} in strings is deprecated, use {$var} instead in /in/uqcjf on line 7 Deprecated: Using ${expr} (variable variables) in strings is deprecated, use {${expr}} instead in /in/uqcjf on line 8 string(7) "foo var" string(18) "dynamic var lookup"
Output for 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.32
string(7) "foo var" string(18) "dynamic var lookup"

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