How to insert a string before a matched string

Question

How can I insert a string before a matched string. Suppose I want to insert a string a before "if (PROTOCOL == "https://")" string. Please tell me how can I do this??

or

How to search and replace a string like

function __construct($url='', $loc='')
{

to

function __construct($url='', $loc='') {

Please help if any one can know that.

Answer 1

sed command is used to replace word / string syntax

The syntax is as follows:

sed -i 's/function __construct($url='', $loc='') {/function __construct($url='', $loc='') {/g' file_name