{"id":2517,"date":"2017-12-08T12:43:10","date_gmt":"2017-12-08T12:43:10","guid":{"rendered":"http:\/\/www.scmgalaxy.com\/tutorials\/?p=2517"},"modified":"2025-02-01T23:07:59","modified_gmt":"2025-02-01T23:07:59","slug":"the-difference-between-my-and-local","status":"publish","type":"post","link":"https:\/\/www.devopsschool.com\/blog\/the-difference-between-my-and-local\/","title":{"rendered":"The difference between my and local"},"content":{"rendered":"

rajeshkumar created the topic: The difference between my and local<\/strong><\/p>\n

There is a subtle difference.<\/p>\n

In the example below, $::a refers to $a in the ‘global’ namespace.
\n‘local’ temporarily changes the value of the variable, but only within the scope it exists in.
\n$a = 3.14159;
\n{
\n\tlocal $a = 3;
\n\tprint “In block, \\$a = $a\\n”;
\n\tprint “In block, \\$::a = $::a\\n”;
\n} <\/p>\n

print “Outside block, \\$a = $a\\n”;
\nprint “Outside block, \\$::a = $::a\\n”;<\/p>\n

# This outputs In block,<\/p>\n

# This outputs
\nIn block, $a = 3
\nIn block, $::a = 3
\nOutside block, $a = 3.14159
\nOutside block, $::a = 3.14159<\/p>\n

‘my’ has no effect on the global $a, even inside the block. <\/p>\n

$a = 3.14159;
\n{
\nmy $a = 3;
\nprint “In block, \\$a = $a\\n”;
\nprint “In block, \\$::a = $::a\\n”;
\n}
\nprint “Outside block, \\$a = $a\\n”;
\nprint “Outside block, \\$::a = $::a\\n”;<\/p>\n

# This outputs
\nIn block, $a = 3
\nIn block, $::a = 3.14159
\nOutside block, $a = 3.14159
\nOutside block, $::a = 3.14159<\/p>\n

Regards,
\nRajesh Kumar
\nTwitt me @ twitter.com\/RajeshKumarIn<\/a><\/p>\n

scmuser replied the topic: Re: The difference between my and local<\/strong><\/p>\n

With more explanation…<\/p>\n

Both of them are used to declare local variables.
\nThe variables declared with “my” can live only within the block it was defined and cannot get its visibility inherited functions called within that block, but one defined with “local” can live within the block and have its visibility in the functions called within that block.<\/p>\n","protected":false},"excerpt":{"rendered":"

rajeshkumar created the topic: The difference between my and local There is a subtle difference. In the example below, $::a refers to $a in the ‘global’ namespace. ‘local’ temporarily changes… <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[14],"tags":[498],"class_list":["post-2517","post","type-post","status-publish","format-standard","hentry","category-perl","tag-local"],"_links":{"self":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/2517","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/comments?post=2517"}],"version-history":[{"count":2,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/2517\/revisions"}],"predecessor-version":[{"id":2520,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/2517\/revisions\/2520"}],"wp:attachment":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/media?parent=2517"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/categories?post=2517"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/tags?post=2517"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}