php - replace first occurrence from right and left side of string -


i tried replace first occurance of json string { right side, , left side } . 

$json_data = preg_replace( '/\{/' , '', $json_data ,1 ); $json_data = rtrim( $json_data ,'}' ); // here issue

but string {"chart":"c12","series":{"name":"test","data":[]}} replaced 

"chart":"c12","series":{"name":"test","data":[]

the rtrim replaced '}}' . how replace first occurance of } right side of string ?

$json_data = preg_replace('/^\s*\{\s*(.+)\s*\}\s*$/', '$1', $json_data);

however, it's difficult imagine situation when it's necessary.


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