Remove whitespace (or other characters) from the beginning of a string
[...] = optional ... = your value
[var $... = ]call ltrim $val=…[;$charlist=…]
<!--parser:xtscript-->
#assign a space to a variable
var $space =call chr $val=32

var $input =xyz FOOBAR zyx
var $input =$space$input$space

# default  ltrim 
var $output = call ltrim $val=$input
print default ltrim<br />
print input =|$input|<br />
print output =|$output|<br /><br />

# a space can be added (not at the end) as a part of a $charlist of 2 or more characters
var $output = call ltrim $val=$input ; $charlist=xy z 
print a space in the charlist<br />
print input = |$input|<br />
print output = |$output|<br /><br />

# specify a range of characters with ..
var $input = ABCDEFGHIJKLMABCDEF
var $output = call ltrim $val=$input ; $charlist= A..F J..M
print trim a range of characters<br />
print input = $input<br />
print output = $output
<!--/parser:xtscript-->
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default ltrim
input =| xyz FOOBAR zyx |
output =|xyz FOOBAR zyx |

a space in the charlist
input = | xyz FOOBAR zyx |
output = |FOOBAR zyx |

trim a range of characters
input = ABCDEFGHIJKLMABCDEF
output = GHIJKLMABCDEF