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<?php $a = array(); $a["foo"] = "bar"; $a["baz"] = "quux"; $a["100"] = "zimbabwe"; echo "\$a is an associative map with some things in it: "; var_export($a); echo "\n\n"; $keys = array_keys($a); echo "It has these keys: "; var_export($keys); echo "\n\n"; echo "But there was a silent string-int coercion when we added an object to the container using a string key that looked like an int\n\n"; var_dump( is_string($keys[2]) );
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
$a is an associative map with some things in it: array ( 'foo' => 'bar', 'baz' => 'quux', 100 => 'zimbabwe', ) It has these keys: array ( 0 => 'foo', 1 => 'baz', 2 => 100, ) But there was a silent string-int coercion when we added an object to the container using a string key that looked like an int bool(false)

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