Escapes a lucene query string

# SolrUtils::escapeQueryChars

(PECL solr >= 0.9.2)

SolrUtils::escapeQueryChars — Escapes a lucene query string

### Description

public static SolrUtils::escapeQueryChars(string `$str`): string|false

Lucene supports escaping special characters that are part of the query syntax.

The current list special characters are:

    + - && || ! ( ) { } [ ] ^ " ~ * ? : \ /

These characters are part of the query syntax and must be escaped

### Parameters

`str`

  This is the query string to be escaped.

### Return Values

Returns the escaped string or `false` on failure.

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