按原样创建包含混合引号的字符串变量

Question

How can I take a string with lots of mixed double and single quotes:

curl -A 'Curl/2.5' -d '{"key":"$api_key","message":{"html":"<p><h1>Hello World</h1><\/p>"}'

and create a string variable such as:

$curl_command = "curl -A 'Curl/2.5' -d '{"key":"$api_key","message":{"html":"<p><h1>Hello World</h1><\/p>"}'"

Without returning "unexpected ' errors"? I want to avoid changing the original string.

Answer 1

You can use heredoc syntax and escape all the quotes and double quotes easily.

Here is the syntax for it. http://www.php.net/manual/en/language.types.string.php#language.types.string.syntax.heredoc

Take care not leave space before the heredoc identifier.