{"componentChunkName":"component---src-templates-blog-post-js","path":"/blog/2008/11/20/concatenating-arrays-in-php/","result":{"data":{"markdownRemark":{"html":"

Just a quick post so I know where to look the next time I forget how to concatenate arrays in PHP.

\n

Use array_merge to concatenate two numerically-indexed arrays; not array_push and not the array union operator: +.

\n
$first = array('doh', 'ray', 'me');\n$second = array('fah', 'soh', 'lah', 'te', 'do');\necho "Union: ", var_export($first + $second, true), "n";\necho "Merge: ", var_export(array_merge($first, $second), true), "n";\n// array_push returns int, not an array:\narray_push($first, $second);\necho "Push: ", var_export($first, true), "n";
\n

The output:

\n
Union: array (\n    0 => 'doh',\n    1 => 'ray',\n    2 => 'me',\n    3 => 'te',\n    4 => 'do',\n)\nMerge: array (\n    0 => 'doh',\n    1 => 'ray',\n    2 => 'me',\n    3 => 'fah',\n    4 => 'soh',\n    5 => 'lah',\n    6 => 'te',\n    7 => 'do',\n)\nPush: array (\n    0 => 'doh',\n    1 => 'ray',\n    2 => 'me',\n    3 =>\n    array (\n        0 => 'fah',\n        1 => 'soh',\n        2 => 'lah',\n        3 => 'te',\n        4 => 'do',\n    ),\n)
\n","timeToRead":1,"frontmatter":{"title":"Concatenating arrays in PHP","blurb":"A short reminder of different ways to combine two arrays in PHP","date":"2008-11-20T12:46:48.000Z","modified":"2011-01-03T17:20:13.000Z"}}},"pageContext":{"slug":"/blog/2008/11/20/concatenating-arrays-in-php/","next":{"fields":{"slug":"/blog/2009/02/23/macbook-pro-not-so-bad/"},"frontmatter":{"title":"The MacBook Pro’s not so bad..."}},"previous":{"fields":{"slug":"/blog/2008/10/14/google-where-art-thou-time-conversion/"},"frontmatter":{"title":"Google: Where art thou time conversion?"}}}},"staticQueryHashes":["1192980692"]}