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@mgdm

mgdm/jsonprint

Created Apr 6, 2011
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Pretty-print JSON from any URL PHP's file_get_contents can reach
#!/usr/bin/php
<?php
function usage() {
echo "Usage: " . $_SERVER['argv'][0] . " [-v] URL\n";
echo "\nPretty-prints JSON output from a URL.";
echo "\n\t-v\tDecode JSON and use var_dump to display result\n";
}
/**
* Indents a flat JSON string to make it more human-readable.
* Stolen from http://recursive-design.com/blog/2008/03/11/format-json-with-php/
* and adapted to put spaces around : characters.
*
* @param string $json The original JSON string to process.
*
* @return string Indented version of the original JSON string.
*/
function indent($json) {
$result = '';
$pos = 0;
$strLen = strlen($json);
$indentStr = ' ';
$newLine = "\n";
$prevChar = '';
$outOfQuotes = true;
for ($i=0; $i<=$strLen; $i++) {
// Grab the next character in the string.
$char = substr($json, $i, 1);
// Put spaces in front of :
if ($outOfQuotes && $char == ':' && $prevChar != ' ') {
$result .= ' ';
}
if ($outOfQuotes && $char != ' ' && $prevChar == ':') {
$result .= ' ';
}
// Are we inside a quoted string?
if ($char == '"' && $prevChar != '\\') {
$outOfQuotes = !$outOfQuotes;
// If this character is the end of an element,
// output a new line and indent the next line.
} else if(($char == '}' || $char == ']') && $outOfQuotes) {
$result .= $newLine;
$pos --;
for ($j=0; $j<$pos; $j++) {
$result .= $indentStr;
}
}
// Add the character to the result string.
$result .= $char;
// If the last character was the beginning of an element,
// output a new line and indent the next line.
if (($char == ',' || $char == '{' || $char == '[') && $outOfQuotes) {
$result .= $newLine;
if ($char == '{' || $char == '[') {
$pos ++;
}
for ($j = 0; $j < $pos; $j++) {
$result .= $indentStr;
}
}
$prevChar = $char;
}
return $result;
}
$url = null;
$asVarDump = false;
foreach ($_SERVER['argv'] as $arg) {
if ($arg == '-v') {
$asVarDump = true;
} else if ($arg == '--help') {
usage();
exit;
} else {
$url = $arg;
}
}
if (!$url) {
usage();
exit(-1);
}
if ($asVarDump) {
$result = json_decode(file_get_contents($url));
var_dump($result);
} else {
$result = indent(file_get_contents($url));
echo $result;
}
echo "\n";
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