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Top Forums UNIX for Dummies Questions & Answers Substitution in first occurrence with sed Post 302969167 by RavinderSingh13 on Saturday 19th of March 2016 01:22:29 AM
Old 03-19-2016
Hello Xterra,

Following may help you in same, let's say we have following Input_file.
Code:
cat Input_file
string1 string3 string4 string1

Then following is the code which may help you in same.
Code:
sed 's/string1/string2/1'  Input_file

Output will be as follows.
Code:
string2 string3 string4 string1

Hope this helps you.

Thanks,
R. Singh
 

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CTYPE_PRINT(3)								 1							    CTYPE_PRINT(3)

ctype_print - Check for printable character(s)

SYNOPSIS
bool ctype_print (string $text) DESCRIPTION
Checks if all of the characters in the provided string, $text, are printable. PARAMETERS
o $text - The tested string. RETURN VALUES
Returns TRUE if every character in $text will actually create output (including blanks). Returns FALSE if $text contains control charac- ters or characters that do not have any output or control function at all. EXAMPLES
Example #1 A ctype_print(3) example <?php $strings = array('string1' => "asdf ", 'string2' => 'arf12', 'string3' => 'LKA#@%.54'); foreach ($strings as $name => $testcase) { if (ctype_print($testcase)) { echo "The string '$name' consists of all printable characters. "; } else { echo "The string '$name' does not consist of all printable characters. "; } } ?> The above example will output: The string 'string1' does not consist of all printable characters. The string 'string2' consists of all printable characters. The string 'string3' consists of all printable characters. NOTES
Note If an integer between -128 and 255 inclusive is provided, it is interpreted as the ASCII value of a single character (negative val- ues have 256 added in order to allow characters in the Extended ASCII range). Any other integer is interpreted as a string contain- ing the decimal digits of the integer. SEE ALSO
ctype_cntrl(3), ctype_graph(3), ctype_punct(3). PHP Documentation Group CTYPE_PRINT(3)
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